When I call SMJobBless I am getting the following error

2012-03-11 21:37:44.021 MyApp[40313:903] Bless Error: Error Domain=kSMErrorDomainFramework Code=3 UserInfo=0x100129c70 "The operation couldn’t be completed. (kSMErrorDomainFramework error 3 - The client and tool did not match requirements.)"

I have:

Any idea on how to debug this?