Mostly get an error "could not write to channel" when trying to upload

[amca01]

I've got termscp set up with the local directory on one side, and the remote directory on the other side (as it should be); that is, I've logged into the remote machine with correct port and login details. But almost every time, hitting <SPACE> for transferring a file results in the error

Could not upload file: File transfer error: failed to create file (protocol error (Could not write to channel: 
Remote channel is closed))

I have no idea what's going on, or how to fix it. I can run scp happily from the command line with no issues. I have had a few successful transfers with termscp, but only a few. Most of the time I get the above error.

Is there any way I can overcome this? I like the look of termscp, and I'd love to use it.

Many thanks!