enrollment information is invalid or has expired

Hi experts,

We're having trouble with the IOS enrollments, right now we had a server with Afaria 7 SP4 Hotfix 6, we're loging using active directory. We can enroll android devices without any problem but when we try to enroll IOS 7 devices using the aipsR url we get this error "Your enrollment information is invalid or has expired. Please restart your device enrollment process."

All the diagnostic lights are in green and the certificate authority is "passed".

any Ideas?

Thanks