cannot connect via command line but works via GUI

winscp 4.0.6 (Build 358)
I could connect successfully via FTP to the server using the GUI. But my script run on the same client timed out.
Below is excerpt of my script:
option batch on
option confirm off
open user:password@ftp.server.com:21

below is the error:
batch on
confirm off
Searching for host...
Connecting to host...
Host has not answered for more than 15 seconds. Still waiting...
Warning: Aborting this operation will close connection!
(A)bort: Abort
Terminated by user.

Without the port, the error message is:
batch on
confirm off
Searching for host...

Network error: Connection timed out.

Any insights?

Can you try that with 4.1.4 beta?

Thank you for the response, Martin.
I tried 4.1.4 beta. Unfortunately, it also failed.

tried using a saved profile in winSCP and getting it to open that connection instead of defining it in the file?
Less secure but would test its capable via the command line surely?

I have resolved it. I just added the protocol to the open command.
open ftp:user:password@site.com
Thanks all for your help.