why is no valid OpenCL device found?

hi all
I realize someone else has posted something similar recently and was unsure if I should post this in that thread or not.
I've recently installed Daz4.11 beta and tried experimenting with dForce only to get a " no valid OpenCL device found" message....my card and drivers are supposed to support OpenCL ....anyone know what I have to do?
thanks
Comments
ha I'm thinking now that if Richard didn't know what to suggest other than reinstalling the drivers then me posting what I did was probably redundent....oh well I've put out the call for assistance and maybe someone will come to my aid.
What are your system specs?
Your card has to support the specific version of OpenCL required by dForce, not just any old OpenCL (1.2 IIRC?)
Also make sure you select your GPU as the dForce/OpenCL device in your Simulation Settings/Advanced Tab.