Can't Change Latency of U46 MK2 due to Multichannel MME

I've been unable to change the latency on the control panel of my U46 MK2. When I open the Latency panel in the config tab of the control panel and try to change it it say something along the lines of: Error! MME Multichannel running. Stop and Close this and try again!
I've had a peek and my U46 doesn't appear to be set as the default soundcard so there shouldn't be a conflict between that and my PCs card!
Ant suggestions? :o)
Sp:ke
I've had a peek and my U46 doesn't appear to be set as the default soundcard so there shouldn't be a conflict between that and my PCs card!
Ant suggestions? :o)
Sp:ke