Akai MPC Element - any user here - problem with USB

Any MPC user here ? I'm posting it here at software instead of hardware as it seems driver related.
 
I just installed my MPC Element / Essential software and it operate well within the MPC hardware. But when I plug out the MPC pad and reuse the USB for a midi keyboard, the midi keyboard will only operate a minute or two and then shuts off. I have to unplug the USB cable and re-insert it, then it will operate for a while, before it shuts off again.
 
I think it only affects the USB port that was connected to the MPC and not other USB port as my Roland Quad continue to work normally. After I uninstalled the Akai/MPC USB driver and restart the PC, the USB midi keyboard works fine without shutting off.
 
To Akai MPC users, do you have to set aside a USB for your MPC full time ?
 
Edit : The above scenario is while I'm running Sonar.

did you try swapping them out without sonar running?

pwalpwal
did you try swapping them out without sonar running?

 
I only tested it while Sonar was running, for recording midi tracks. Don't really use a midi keyboard controller outside of Sonar, but I may test it at a later time - which means I'll have to install the Akai MPC driver again, something I'm kinda reluctant to do so.