Failed to authenticate

I have a BDC that was connected my WAN on one subnet then moved it to a different segment changing the subnet now I get the following error in the event log on the PDC when the BDC tries to authenticate. I can ping and tracert the machine by name orIP so I?m not sure what is going on. Help. Following is the message as it appears in the event log.

“The session setup from the computer SERVERX failed to authenticate. The name of the account referenced in the security database is SERVERX$. The following error occurred:
Access is denied.”