Interactive Flat PanelsActivSlate on the wrong monitor.

My apologies Martin, I did miss that re: main display. 
Please find the link to the latest ActivDrivers here

Just to make sure, please can you confirm which type of Slate you are currently using? 
Have a look at our Knowledge Base here to identify your slate. 
Does yours connect/ register to the 2.4 ghz Hub? 
Are you on a Windows or Mac operating system? 

Make sure your board and Hub are not connected whilst upgrading the drivers. 
After that I would re-register the Slate to the Hub, assuming you have an ActivSlate 50 or 60 or our first 2.4 hub generation type.