Trouble syncing group folder

I have been invited to join a group, but it will not sync with my local library. I try to sync and it says that it does it with no error message, but the group library will not appear. The group does show up when I login online and says I have viewing and editing access. I have tried uninstalling and reinstalling the Firefox add-on, but that hasn't helped. I'm using version 2.0.2 of Zotero and Firefox 3.6. A colleague created a test library and invited me to join, and that one showed up when syncing and is fully usable. Any ideas for how to troubleshoot?

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