Beaming files - HTC touch diamond?

hiyaa I have an htc touch diamond but since 1 month ago I got this problem with bluetooth, I can't recieve or send files!!! I know how to, I've done it loads of times but I get the screen for half a second that says "to beam, select your device" but then it just goes back to file explorer again! And even before when that didn't happen, it just said "Failed" whenever i chose to beam anything...and if anyone tries to send me anything it fails for them as well!!!!!!
Pleaseeee help me :(
thanks!

xxxx
 
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