Windows 2012 Clustering

Hi,
I have successfully built a 2 node cluster and today I had to add one more node to the cluster which is in the other data center and in the same domain.
But I am getting the error while adding the node which I already fixed yesterday when building the cluster(Permissions to create objects in the AD).

The user running validate, does not have permissions to create computer objects in the “x” domain.

Any thoughts on this?

Thank you