datastore path is not found

Hello,

I am having some troubles backing up our Exchange 2010 Server.

I am using vmProtect 7.

When I first add the task and run the backup, it works with no errors at all but every subsequent backup fails. Here is the log:

-----------------------
Task 'HO-EX01 Backup' failed: 'Failed to create a backup.
Additional info:
--------------------
Error code: 3
Module: 435
LineInfo: 555b5abba09500ab
Fields:
Message: Failed to create a backup.
--------------------
Error code: 32786
Module: 114
LineInfo: 28314c961de7d3b2
Fields:
Message: Failed to prepare for backing up.
--------------------
Error code: 353
Module: 149
LineInfo: a71592046cb2c5f8
Fields:
Message: Failed to back up the group.
--------------------
Error code: 2
Module: 218
LineInfo: 338a407ad20e0987
Fields:
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 226
Module: 83
LineInfo: a859dd78cc91e09e
Fields:
Message: Failed to log in to virtual machine '[ss1_vmh-vmfs-r5-f-10] HO-EX01/HO-EX01.vmx'.
--------------------
Error code: 163
Module: 83
LineInfo: bc190fbcd6b29600
Fields: ErrorCode : 38
Message: The datastore corresponding to the given datastore path is not found
--------------------'.
-----------------------

If I delete the task and re-create it, the backup will work but only once.

Any ideas why this is happening?

Thanks,
Mike