SCv3020 wont join domain

I can not get our storage center to join our domain. We renamed our SC from it's default SN{serial number} host name to one that fits our network specification for naming. Went into directory services settings, enabled it.. it gave me the auto configured stuff which was correct, changed the relative base DN to the OU that out SANs are placed into set the Base DN to the root folder that holds our user accounts and the SAN OU under it... set the LDAP domain, storage center host name is correct... directory type is active directory... URI's are all right. If I do a test server it works fine and gives me the message "Successfully test directory servers" However when I do a join domain using the admin user name as DOMAIN\adminuser with the correct password I get "Join domain failed for host: MGMT-SAN.Domainname.com" but with our domain name and our host name.. DNS Servers are pointing to the DNS servers set up on our active directory servers, in the DNS we have an A record for the SAN that has the same host name and points to the virtual management IP of the SAN. Reverse DNS also resolves correctly. Time server is set to the domain controller's so their time is in sync. In the SC logs there is the following Join domain failed for host MGMT-19-SAN.Domainname.com CADSJoin failed: cmdline is [scjoin -Z 0 -v 2 -A DOMAINNAME\adminusername -P ********** -- tls 0 -H "ldap://OURSERVERNAME:389" --real DOMAINNAME MGMT-19-SAN.DOMAINNAME.COM] error dns rEVERSE LOOKUP FAILED FOR FQDN MGMT-19-SAN.Domainname.com (but when I do it manullay its correct) Last kerberos/AD join statis is: join failed if I do a NSLOOKUP on the DNS locally on the domain controller the reverse entry returns correct for the IP of the SAN's virtual management IP What am I missing?