Looks like the project server is having problems.

Here is what I see on my event log

Cosmology@Home - 12/10/2013 3:05:49 PM - Giving up on download of params_112813_092117_0.ini: - permanent HTTP error
btw, if you are using the stock BOINC Manager client, may I suggest giving BoincTasks a try. It's an alternative BOINC Manager that is magnitudes better then the stock client.

BoincTasks Homepage (Here)

BT Online manual (Here)

Edit: Hmmm, went to suspend the project and found that I now have Cosmology work. Go figure...