Cisco ISE 1.2 AD Integration Error

Hello,
I have a fresh install of Cisco 1.2.0.899 on a VM. I cant seem to join it to the Active Directory. It gives a message that says "Cannot Reach ISE Node" in the section where its supposed to show "Not Joined to the Domain".  On further Examination i also noticed that i cannot download logs. it gives me an error that reads "Cannot Reach ISE Node".
Can someone please tell me what could be the possible cause of this error and how it can be resolved.
I have licences already installed added on the ISE Node. Re-imaging it will not be a good idea i guess.
Thanks
Ibrahim Kabir

I'd like to confirm if the required changes in the VM server were
made, as there are a few changes in the ISE OS. The changes required are
listed in the release notes, under "VMware Operating System to be
Changed to RHEL 5 (64-bit)". Here's a direct link to the relevant section:
http://www.cisco.com/en/US/docs/security/ise/1.2/release_notes/ise12_rn.html#wp384531
Other causes can be :-
certificate issue on ISE or not enough disk space.

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