Failed file submission and file lookup

Hi, I am new to Comodo, I have a number of files building up in the My Pending Files list. When I try to look up any of these files, I get a yellow triangle with an ! and error written next to it, and when I try to submit any for analysis, I get a message saying “421 Idle timeout (20 seconds): closing control connection”
Is there something I am doing wrong?
I am running the latest version of comodo, on a Windows Vista machine, with all the latest updates.
Many thanks for any help.

Its a server error and not an error with Comodo. Just purge and delete them then move the the D+ slider to safe mode so you no longer have to deal with pending files.