GPU Not Rendering

I have an AMD Radeon GC 7000+ series. According to ALL blender reports, My GC is usable with OpenCL GPU Rendering. I finally got Blender to “See” my card. I had to downgrade from 2.79 to 2.78c in order for it to finally show the OpenCL option, now I am able to load GPU and it is not grayed out in the settings under render, But it gets stuck on a transparent image block when I render using GPU. How do I fix this. I had this issue a month ago and now I can’t seem to find anything on this issue. I fixed it before and it was simple as simple gets. But I can’t remember how and I can’t find anything online.