Ya know, I had this problem, but I thought it was my server. 😛 I did everything I could to get it to work. I am such a moron. I used to have this in an .htaccess in the root of my hosting. But it broke some software I used so I removed it… I just realized, upgrading of WordPress broke at about the same time as I removed it.
Sounds like the plugin file wont open. The error makes me think the file needs chmodding so WordPress can open it.
