Hi Angelina (?),
Hello, I'm using Trados 6.5
...which version (go to Help - About... to find out)?
and I was trying to translate an Excel file in TagEditor, but it does not open the file in there. Instead, I am getting a message (80005) Connection with server application error: The server threw an exception.
This may indicate a communications problem between different software components. If restarting the computer doesn't help, you may want to try (re-)registering Trados applications (Start - Programs - Trados 6.5 - Register Trados 6.5).