hey guys! I have a USB DVB card that works good! 3 days ago I have working on virtual com ports in matlab soft! and after that when I connect dvb card to my laptop usb ports the dvb software doesn't detect dvb card! and shows this message: all capable dvb adapters are busy no free device has been found after that I try to reinstall matlab and dvb soft and dvb driver too, but it hasn't work yet! please help! I don't know what to do! would u help me plz?!