Hello,
I have no problem controlling the Atik EFW2 on a 64-bit Windows 7 laptop using Nebulosity via ASCOM. I am using Nebulosity V2.5 and ASCOM V6.0. Please could you provide details of how it is failing, with screenshots of any error messages? We will need to look into the problem with FilterWheelRunner reported by Vincent.
Best regards,
Jonathan
(Atik)