Still not sure why? I have decent user board site on photography and growing album. We have small but active community with no objectionable content/incidents
I think you mean Casale Media. They are very picky networks, I have never been able to join either. If you are looking for cpm banner payment you can try budsinc.com, not so picky although their rates aren't very good.
My experience with Primary ads is that they reject you the first time and then expect you to contact them in order to make sure you are serious. They are my favorite affiliate program, so I would definitely email them and ask why you were rejected.