Problems displaying backround scene.

I am just looking for any common problems that may be preventing me showing my background scene via scene actuator…if anyone can point out some common issues I would appreciate it.
I did look at some tutorials about it in case I did something wrong, but it seems pretty straight forward and did not see anything I did not already do, or anything I thought was ‘rocket science’ so to speak…but my background simply shows up as grey.

EDIT: and good luck everyone on the BMC this round :slight_smile:

EDIT 2: Ok, it is working, I am not sure what was wrong, but when all else fails restart blender :slight_smile: