Problems with .zip

I’ve been having problems uploading .zip folders since I switched host companies. I thought this plugin would be the answer. I was surprised .zip was not a default selection. I tried a custom entry with the info below, but it didn’t work.

Add your custom file types
Description (*)
Zip Archive

File Extension (*)
.zip

Mime Type (*)
application/zip

The page I need help with: [log in to see the link]