Error with terminal activity


I am trying to automate an vax vms system which is connected using putty telnet.

I tried terminal activity to get it done.I am using vt option in terminal activity to connect with the remote server.

The windows allows me to type into but does not display any thing even after typing values.The cursor moves through the screen for each character typed but results are not visible.

I need to get result of the command executed from the screen.

Please find the attached screenshot.

Can any one help me on this?