strange, had k800i and everything was fine, connect usb cable and open phone explorer everything worked,

gets new phone k850i and things go downhill, when i connect the phone nothing, happens, tried everything, used pc suite, nothing, used phone explorer nothing,

when i connect anything usually the computer recognizes it and tries to find hardware, or whatever,

when i connect this phone nothing happens at all, thought it was problem with phone, took it back to vodafone and they tried it on there computer and it came up straight away, it worked 1st time, 5 times she tried it and it worked every time, it came up with the menu on phone and her computer says phone found or something like that,

iv tried for 1 week now to resolve this problem but nothing works,

please help, if need any more information please just ask, i will do anything to resolve this problem, the usb port works fine cause my daughters k800i still works fine when i insert usb cable

im using windows xp, is this a hardware problem

thanks in advance