Problem on 2008 Server R2 and PSPad


I have installed Comodo firewall (and antivirus) on Windows 2008 Server R2 (x64) and now, I can’t run the program PSPad (Caractéristiques - PSPad - freeware HTML editor, PHP editor, XHTML, JavaScript, ASP, Perl, C , HEX editor). He complains that I need to have at least Windows 98. When I remove completely comodo, all is fine. If I remove only the firewall part, or only the Antivirus part, it is not running. I have disabled the Defense+, firewall and antivirus, and PSPad doesn’t run too. I must uninstall completely Comodo.

Does sompeone have any idea about what I could do?

Thank you