take a look here these are all people with similar problems see if you can find a fix in there i dont know what else to tell you.
http://reviews.cnet.com/5208-7588-0.html?forumID=70&threadID=103929&messageID=1189903
http://reviews.cnet.com/5208-7588-0.html?forumID=70&threadID=103929&messageID=1189903