Truble instaling new theme.

Hello!

I want to upload theme made in Artisteer, but through I do follow the steps you describet it just tries to upload for some time and then it shows a blank page with small window that says “are you sure you want to do this” nad only thing i can click at is a link belov that says “Please try again” and than I get back to cPanel like nothing happend. I tried it with other artisteer theme just to check it out and it was working. What could go worong? Is there a limit in .zip file size?