Unable to add server error code 5102

I'm trying to add a Macbook Pro with Snow Leopard 10.6.4 to our Windows Server 2008 R2 Active Directory, and when i try to join the domain, I get the following error after the "Joining Active Directory..." step" "Unable to add server. Credential operation failed because an invalid parameter was provided. (5102)."

I'm not really sure what invalid parameter I'm providing

Server: domain.local

Client Computer ID: macbook-02
AD Admin User: administrator
AD Admin Password: Some$pass2010

This isn't the actual info verbatim for obvious reason, but i kept it pretty close including the $ in the password. Anyone have any idea why it would be giving me this error? I have added one Macbook sucessfully to the domain, but the other two i have no success. I cannot for the life of me remember what i did to the the first one connected so any help would be appreciated!
DerekCampanileAsked:
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Chris MillardConnect With a Mentor Commented:
Could it possibly be due to password complexity? I don't have a Mac at all, but I know that my iPhone (before the recent iOS update) wouldn't connect to Exchange if certain characters were in the password - the @ character being one example.
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DerekCampanileAuthor Commented:
well it looks like that's the problem. Just created an admin log in account soley for mac AD authentication with a password with no non-alphanumeric characters and it authenticated.. Thanks for the tip!
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