Did you registered public part of the key on the server?
Are you able to authenticate using GUI with the key?

My script now contains
"option batch abort
option confirm off
open sftp://kpu010@scp.sssnet.com/ -privatekey=rsa_keypr.ppk
put tve-export.tab /home/kpu010/
exit"
In order to use the command line Winscp said I had to use keys converted by PuTTYGen.
I did this and when I run the command now I get "Server refused our key" and promts for a password.
Any suggestions?

You can specify your private key using -privatekey= switch of open command:
https://winscp.net/eng/docs/scriptcommand_open

I am trying to upload a file to a remote server. Using winscp I can drag it across just fine. I have a public key stored there. When I try to use a script it wants a password enered. Before I enter my password it closes. I use "winscp.com /script=SFTPTVE.txt" on the command line, the put command is in the txt file. How do I get this to go? Actually I have
"option batch abort
option confirm off
open sftp://kpu010@scp.sssnet.com/
put tve-export.tab /home/kpu010/
exit"
in the txt file.