Sorry, today I was a bit busy and couldn't work on this issue. But it still a bit wird, because certain errors are odd for me (for example, "There is no such object on the server") and they shouldn't appear. Tomorrow I will go though the code again to find something related.
There were definitely some service and permission issues on the remote CAs.in the previous post you said that your service account has all required permissions?
Up to this point, all my issues have been permissions, local group membership, and remote-registry service related issues.what is the current status? Can you connect to CA (which located in domain B) from a management computer in domain A?