Dul head: Mouse lag problem

[GDVS]

Ok, I've got my shiny new 7800GT and all is well in single monitor mode but activating dual head causes immense mouse lag. As I mainly want dual head so I can pursue other activites while waiting for the next round to start in AA mouse lag is NOT acceptable. Google tells me a lot of people have this problem but no solutions, I'm using the latest Forceware drivers so does anyone have any advice? I'm a complete noob where dual head is concerned.

[EDIT]Ok, so I fixed it. Quick tip: When reorganising your desk to fit dual monitors don't move your wireless mouse receiver out of line of sight with the mouse.[/EDIT]