[X3nZ]

Well... some moderators find threads useless and deletes them, not feeling like telling the thread started why because they must of broke a rule or posted something that has already been answered..

Ask yourself:

-What was your friends topic about?
After you find out, search the forums to see if it or a similar thread has been posted and resolved

-Did he break any rules in his thread?
Moderators do look out for that, as it's their job, to keep the forums clean as possible, and to ensure everyone is following all the rules.

I hope I helped,
Thanks,
Disturbed!