Am relatively new to SolidWorks and seem to come across a lot of problems due to simple conflicts but I can't seem to work out why this circular pattern won't work... I've tried doing the instances one at a time and have even tried creating the pattern with a single extrude.  Any ideas???  Getting desperate!

If you can't see it the error bubble reads: "Rebuild Errors. Unable to create instances for the pattern. Try again by decreasing the number of instances or the distance between instances."