MediaCore CMS Upload Issues

Hello, We have several MediaCore CMS installations on our dedicated CentOS release 5.5 linux web server. MediaCore is a Python script used to organize/display multimedia content. You can take a look at this script by visiting mediacore dot com. The scripts have installed fine on our server. The only issue, is that we can no longer upload content through the mediacore interface. From my understanding, flash works behind the scenes of mediacore to handle the transfer (though this may be incorrect infor.). The uploads used to work correctly, but no longer. We need someone to take a look at the issue, figure out the problem, implement a fix, and let us know what went wrong! Python knowledge is an absolute must. If you have experience with MediaCore, that's even better. Thanks so much! David