White screen after creating a conference

I've been working with COD to try and get this install to work and I think I'm close. The issue that keeps coming about and I can't seem to get beyond the creation of a conference, I get a white screen after creating the conference with the url of:

http://localhost/conference6/?q=node/3

To get started and get the install workable, I have type in the "?q=admin/settings/clean-urls" after the install completes and then turn off clean URLS. After that, things get going, but slowly. After creating the conference, I get the white screen. When I go to the conference list, it will list the newly created conference in the list of conferences, but clicking on it give the white screen. I've created extra conferences and I get the same result each time I try to do it.

I downloaded the latest COD and stable modules and added in the token module.

Any help would be greatly appreciated. Thanks,

Dan