Crossfader automatically goes to the left side (Channel A)

Hi Team,
I have observed a problem in last couple of days that the crossfader automatically moves to the Left side (channel A) however on hardware its still in middle, so it just happens in software (CrossDj). i tried moving the crossfader on the hardware console and it did not work.
Now i have to move the crossfader manually in software to bring it back in center.
not sure if the problem is with the hardware of software.. Please help.
Its U-Mix Control Pro with crossdj 2.6.0 on windows 7 64 bit os with core i5 processor, 4 gb RAM and 500HDD. Its a Dell latitude..
Thanks you
I have observed a problem in last couple of days that the crossfader automatically moves to the Left side (channel A) however on hardware its still in middle, so it just happens in software (CrossDj). i tried moving the crossfader on the hardware console and it did not work.
Now i have to move the crossfader manually in software to bring it back in center.

not sure if the problem is with the hardware of software.. Please help.
Its U-Mix Control Pro with crossdj 2.6.0 on windows 7 64 bit os with core i5 processor, 4 gb RAM and 500HDD. Its a Dell latitude..
Thanks you
