winscp RemoteFileInfo retrun zero for file permission over FTP

Hello , i am using .net Assembly library . while opening a FTP connection and trying to use session.remotFileinfo , file permission it is returning as zero . but if i open the connection as SFTP, same function call returns correct file permission structure .

even i am calling
fileInfo = mySession.GetFileInfo(DeleteDirectory & "/" & sourceFile(cnt).Text), Winscp is trying to read the file as directory . here is my arguments to winscp GetFileInfo /usr/people/user/AMT/AMT_NMDM_subtest.ssi. attached is the log


. 2015-07-07 20:46:37.556 --------------------------------------------------------------------------
. 2015-07-07 20:46:37.556 WinSCP Version 5.7.4 (Build 5553) (OS 6.1.7601 Service Pack 1 - Windows 7 Enterprise)
. 2015-07-07 20:46:37.556 Configuration: nul
. 2015-07-07 20:46:37.556 Log level: Normal
. 2015-07-07 20:46:37.556 Local account: PACRIM1\E329213
. 2015-07-07 20:46:37.556 Working directory: C:\D_DRIVE\787\MY_Work_Area\TotalControl\bin\Debug
. 2015-07-07 20:46:37.556 Process ID: 15924
. 2015-07-07 20:46:37.556 Command-line: "C:\D_DRIVE\787\MY_Work_Area\TotalControl\bin\Debug\winscp.exe" /xmllog="C:\Users\e329213\AppData\Local\Temp\wscp47C8.02A4F693.tmp" /xmlgroups /nointeractiveinput /dotnet=574 /ini=nul /log="C:\D_DRIVE\787\MY_Work_Area\TotalControl\bin\Debug\winscpLog.txt" /console /consoleinstance=_18376_7044526_745
. 2015-07-07 20:46:37.556 Time zone: Current: GMT+5:30 (India Standard Time), No DST
. 2015-07-07 20:46:37.556 Login time: Tuesday, July 07, 2015 8:46:37 PM
. 2015-07-07 20:46:37.556 --------------------------------------------------------------------------
. 2015-07-07 20:46:37.556 Script: Retrospectively logging previous script records:
> 2015-07-07 20:46:37.556 Script: option batch on
< 2015-07-07 20:46:37.556 Script: batch on
< 2015-07-07 20:46:37.556 Script: reconnecttime 120
> 2015-07-07 20:46:37.556 Script: option confirm off
< 2015-07-07 20:46:37.556 Script: confirm off
> 2015-07-07 20:46:37.556 Script: option reconnecttime 120
< 2015-07-07 20:46:37.556 Script: reconnecttime 120
> 2015-07-07 20:46:37.556 Script: open ftp://user:***@129.239.162.58 -passive=1 -timeout=10
. 2015-07-07 20:46:37.556 --------------------------------------------------------------------------
. 2015-07-07 20:46:37.556 Session name: user@129.239.162.58 (Ad-Hoc site)
. 2015-07-07 20:46:37.556 Host name: 129.239.162.58 (Port: 21)
. 2015-07-07 20:46:37.556 User name: user (Password: Yes, Key file: No)
. 2015-07-07 20:46:37.556 Transfer Protocol: FTP
. 2015-07-07 20:46:37.556 Ping type: C, Ping interval: 30 sec; Timeout: 10 sec
. 2015-07-07 20:46:37.556 Disable Nagle: No
. 2015-07-07 20:46:37.556 Proxy: none
. 2015-07-07 20:46:37.556 Send buffer: 262144
. 2015-07-07 20:46:37.556 UTF: 2
. 2015-07-07 20:46:37.556 FTP: FTPS: None; Passive: Yes [Force IP: A]; MLSD: A [List all: A]
. 2015-07-07 20:46:37.556 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2015-07-07 20:46:37.556 Cache directory changes: Yes, Permanent: Yes
. 2015-07-07 20:46:37.556 Timezone offset: 0h 0m
. 2015-07-07 20:46:37.556 --------------------------------------------------------------------------
. 2015-07-07 20:46:37.563 Connecting to 129.239.162.58 ...
. 2015-07-07 20:46:37.832 Connected with 129.239.162.58. Waiting for welcome message...
< 2015-07-07 20:46:38.074 220 (vsFTPd 2.0.5)
> 2015-07-07 20:46:38.074 USER user
< 2015-07-07 20:46:38.339 331 Please specify the password.
> 2015-07-07 20:46:38.339 PASS *******
< 2015-07-07 20:46:38.586 230 Login successful.
> 2015-07-07 20:46:38.586 SYST
< 2015-07-07 20:46:38.853 215 UNIX Type: L8
> 2015-07-07 20:46:38.853 FEAT
< 2015-07-07 20:46:39.093 211-Features:
< 2015-07-07 20:46:39.093 EPRT
< 2015-07-07 20:46:39.093 EPSV
< 2015-07-07 20:46:39.093 MDTM
< 2015-07-07 20:46:39.093 PASV
< 2015-07-07 20:46:39.490 REST STREAM
< 2015-07-07 20:46:39.490 SIZE
< 2015-07-07 20:46:39.490 TVFS
< 2015-07-07 20:46:39.490 UTF8
< 2015-07-07 20:46:39.490 211 End
> 2015-07-07 20:46:39.490 OPTS UTF8 ON
< 2015-07-07 20:46:39.740 200 Always in UTF8 mode.
. 2015-07-07 20:46:39.740 Connected
. 2015-07-07 20:46:39.740 --------------------------------------------------------------------------
. 2015-07-07 20:46:39.740 Using FTP protocol.
. 2015-07-07 20:46:39.740 Doing startup conversation with host.
> 2015-07-07 20:46:39.740 PWD
< 2015-07-07 20:46:40.001 257 "/usr/people/user"
. 2015-07-07 20:46:40.001 Getting current directory name.
. 2015-07-07 20:46:40.001 Startup conversation with host finished.
< 2015-07-07 20:46:40.001 Script: Active session: [1] user@129.239.162.58
> 2015-07-07 20:46:40.275 Script: pwd
< 2015-07-07 20:46:40.275 Script: /usr/people/user
> 2015-07-07 20:46:40.503 Script: stat -- "/usr/people/user/AMT/AMT_NMDM_subtest.ssi"
. 2015-07-07 20:46:40.503 Listing file "/usr/people/user/AMT/AMT_NMDM_subtest.ssi".
. 2015-07-07 20:46:40.503 Retrieving file information...
> 2015-07-07 20:46:40.503 PWD
< 2015-07-07 20:46:40.752 257 "/usr/people/user"
> 2015-07-07 20:46:40.752 CWD /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:40.985 550 Failed to change directory.
> 2015-07-07 20:46:40.985 TYPE I
< 2015-07-07 20:46:41.252 200 Switching to Binary mode.
> 2015-07-07 20:46:41.252 SIZE /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:41.521 213 8777
> 2015-07-07 20:46:41.521 MDTM /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:41.760 213 20150417225757
. 2015-07-07 20:46:41.760 Retrieving file information successful
. 2015-07-07 20:46:41.760 AMT_NMDM_subtest.ssi;-;8777;2015-04-17T22:57:00.000Z;"" [0];"" [0];---------;0
< 2015-07-07 20:46:41.760 Script: ---------- 0 8777 Apr 18 4:27 AMT_NMDM_subtest.ssi
> 2015-07-07 20:46:44.122 Script: stat -- "/usr/people/user/AMT/AMT_NMDM_subtest.ssi"
. 2015-07-07 20:46:44.122 Listing file "/usr/people/user/AMT/AMT_NMDM_subtest.ssi".
. 2015-07-07 20:46:44.122 Retrieving file information...
> 2015-07-07 20:46:44.122 PWD
< 2015-07-07 20:46:44.377 257 "/usr/people/user"
> 2015-07-07 20:46:44.377 CWD /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:44.621 550 Failed to change directory.
> 2015-07-07 20:46:44.621 TYPE I
< 2015-07-07 20:46:44.857 200 Switching to Binary mode.
> 2015-07-07 20:46:44.857 SIZE /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:45.131 213 8777
> 2015-07-07 20:46:45.131 MDTM /usr/people/user/AMT/AMT_NMDM_subtest.ssi
< 2015-07-07 20:46:45.381 213 20150417225757
. 2015-07-07 20:46:45.381 Retrieving file information successful
. 2015-07-07 20:46:45.381 AMT_NMDM_subtest.ssi;-;8777;2015-04-17T22:57:00.000Z;"" [0];"" [0];---------;0
< 2015-07-07 20:46:45.381 Script: ---------- 0 8777 Apr 18 4:27 AMT_NMDM_subtest.ssi

Your server does not support MLST command, so there's no way to retrieve permissions of a single file.

All you can do is to use Session.ListDirectory and find the file your need in the returned collection. It should include the permission.