Problem with Ventrilo and DSP-500

[Pcrepairman]

hello, I have been having problems with My Plantronics DSP-500. I am on my 11th pair, somehow they keep breaking. But I still love them. Dont Tell em to buy sennhisers becouse I have used them at web2zone and the quality of sound is not there compared to the dsp-500. Well the problem is that some times in Ventrilo, I can still hear everythinga nd i can move throgh channels but I cant Xmit not here ther Xmit noise when i press down button. The second problem is it just does out sometimes. It will just stop workinga dn I get no sound and it Ventrilo or nothing will work. I have reinstalled windows and Ventrilo many times but still get this problem over many reinstalls and different headsets, I dont know what it is can you please help me