TF clone is failing while mounting the replication volumes

We have TF clone job configured for exchange application data using RM and the TF job is failing with the below error...

2012 08 23 07:04:23 MDCPRTFBKP01 000714 ERROR:Cannot mount replica because mount path C:\RM_Mounts\MDCEXMB03\Gdrive\ already exist on the mount host.

2012 08 23 07:04:23 MDCPRTFBKP01 026084 ERROR:Storage Services operation ExecuteMount failed with an error as follows: Storage Services has terminated with an error.

2012 08 23 07:04:23 MDCPRTFBKP01  INFO:Shared resources are now available for another mount restore or unmount operation.

2012 08 23 07:04:23 MDCPRTFBKP01 026084 ERROR:Storage Services operation processExecute failed with an error as follows: Storage Services has terminated with an error.

2012 08 23 07:04:23 MDCPRTFBKP01  INFO:Beginning shutdown of MDCEXMB03 for anywriter agent.

2012 08 23 07:04:23 MDCPRTFBKP01 000149 ERROR:Mount failed. Performing undo of storage operations.

2012 08 23 07:04:28 MDCPRTFBKP01 000071 ERROR:The mount activity has failed.

2012 08 23 07:04:28 MDCPRTFBKP01 000071 ERROR:The mount activity has failed.

2012 08 23 07:04:28 MDCPRTFBKP01 000071 ERROR:The mount activity has failed.

2012 08 23 07:04:16 MDCPRSANMGMT01 102023 ERROR:The mount of replica from application set MDCEXMB03 E2K7 FULL created at 2012 08 23 07:03:33 to host MDCPRTFBKP01 failed.

When we checked in mount server we see the data under the path C:\RM_Mounts\MDCEXMB03\Gdrive\ exists and any idea how to unmount so that the new TF job will moun tthe clones copy...?