Without knowing exactly what your errors are, it would be extremely difficult to pinpoint anything that is causing your problem.
If it is not installed already, try installing the "BugSack" addon.
BugSack on WoWInterface BugSack on Curse.com Both sites have r259 as the latest release.
The download will come with both the BugSack and !BugGrabber addons. This is normal, and both are needed for proper functionality.
After installation, you can find any errors that BugSack has received in the "
Path to your WoW folder\WTF\Account\ACCOUNT NAME\SavedVariables\!BugGrabber.lua" file. You can open it with a plain text editor to see the errors it has captured.
EDIT: I've got to start
READING things instead of just
SCANNING things. Sorry.
/EDIT