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I've never heard of this error before, and a quick search online doesn't come up with any hits for it either. Can you provide more information about the exact error message (or better yet, upload a screenshot here)?
Other information you might want to provide is:
- Have you updated or installed any hardware or software recently?
- Have you done anything unusual to your internet connection lately?
Come to think of it, there's also this:
User Agreement Violators Terminated (Dec. 20)
If this is your problem, you need to contact PlayOnline Support and ask them what's going on with your account.
Icemage