Dag on diferent sites

Dear all,

I am strungling the last 2 days trying to configure dag on exchnage 2010 SP2 between our primary and secondary site. Each site is on diferent subnet, each server has only one nic. I have tried alsmost everything(disable firewalls,restarts,dns,active directory, delete end recreate the cluster, search the error on web, etc...) The erros i see are mentined below. Always the problem is when i try to add the second node. But i can add the second node as first node with no problem, always the problem is adding the second node.

"Failed to initialize cluster with error 0x80004005."

"An error occurred while trying to write to the cluster database. Error: OpenCluster failed with error 1753."