add the following commands to the router:
2801#conf t
2801(config)#mgcp
2801(config)#mgcp call-agent x.x.x.x (ip address of call manager)
2801(config)#ccm-manager mgcp
2801(config)#ccm-manager config server x.x.x.x (ip address of Call manager that is your TFTP server)
2801(config)#ccm-manager config