Belkin 7 Port USB hub - BT and wireless mouse disconnects?

I'm having problems when I return to my Mac Pro Octo 3.0 when I return to it after it's gone to sleep, or even after the monitors have gone to sleep, but not the computer (about an hour).

In order to log in to the computer, or even 'wake' it, I have to unplug and replug the Logitech wireless mouse transmitter/receiver and the BT Dongle (the apple approved one); first the BT, then the mouse (if you plug the BT in after the mouse, it kills the mouse again).

I also have to 'force reconnect' the keyboard using the BT 'send' button on the keyboard, after replugging the BT Dongle.

I have to do this every time the computer gets to sleep. Just a LITTLE annoying. And it wasn't always this way. It seemed to be fine with a 4 port USB hub I was using, but I switched that back and now have the same issues with both hubs regardless. In that 'changeover' was an OS update, which may have been the actual cause, not the hub change.

Any ideas??? Much appreciated...