Try using the IP address of the server in the line instead of the name of it. You can get the ip address by opening a windows command prompt and typing:
ping line_servename_here
and press enter. This should then give you the IP address. You can then replace line_servername_here with the IP address.
eg.
CWS = 135.54.75.212 port username password 01 02 03 04 05 06 07 08 09 10 11 12 13 14
And try that. Doesn't always work.
Maybe get a test line from the request thread and see if that one works.
I have been with TalkTalk for years and not had any issues with lines I have used. Everything is turned off in my talk talk account.