Unable to connect to server-based TM

Forum: SDL Trados support
Topic: Unable to connect to server-based TM
Poster: ADechantsreiter

I was able to connect to the server-based TM properly last week. Now it suddenly no longer appears in the Translation Memories list. When I click on "Add" I get a message that says something like "Check whether the server connection settings are correct and if the server is available." (The wording may not be exact. I am using a German version.) I can click away the message, and in the "Select server-based TM" window I can select the server, which is listed there. Then I get the same error message again and the server appears in red.

I know the server is working because my colleague can get on it. I can also access the SDL TM Server site directly using my browser.

Does anyone have any suggestions?

Thanks