There is a sticky post with an almost identical title to the one you posted at the top of this forum. It's all the information we have on the issue I'm afraid, sometimes people can't get it fixed because the problem can't be diagnosed.
Edit: In fact, you've posted in that sticky thread. Sorry about the fact it's so long (I do keep meaning to consolidate it, but it's quite a task, not to mention mind numbingly boring) but just about every answer is hidden in there somewhere.
Last edited by Mentality; 18/11/07 11:46 AM.