DFS error

I have a problem with DFS, i was using DFS (Replication Group Data
Collection Mode), to backup a folder from one server (windows 2003 R2) to
another Server (window storage server) .
The problem is that for some reason the DFS stop synchronizing the folder in
question, I also tried to synchronize another folder between the two
servers in question but I can't.
When I run the diagnostic report I get the following errors:

ERRORS (There are 4 errors to report)

1. Volume D: is full or failing.
Affected replicated folders: All replicated folders on this server.
Description: The DFS Replication service stopped replication on volume D:.
This failure can occur because the disk is full, the disk is failing, or a
quota limit has been reached. Event ID: 2004
Last occurred: Sunday, August 03, 2008 at 12:45:02 PM (GMT0:00)
Suggested action: Increase the available disk space on the specified
volume or move the replicated folder to a different volume. See additional
information about disk space under the informational section
in the "Amount of disk space used by replicated folders" table.

2 Cannot access DFS Replication performance counters.
Affected replicated folders: All replicated folders on this server.
Description: The DFS Replication service is unable to access the
performance counter DFS Replicated
Folders(ControloHorario-{973F2CF9-4DF4-455B-BF02-E4C27EE3C144})\File
Installs
Succeeded on SERVER02. Performance data is unavailable. Error ID:
0x800007d5.
Last occurred: Sunday, August 03, 2008 at 5:37:06 PM (GMT0:00)
Suggested action: For information about troubleshooting this problem, see
..

3.Cannot access DFS Replication performance counters.
Affected replicated folders: All replicated folders on this server.
Description: The DFS Replication service is unable to access the
performance counter DFS Replicated
Folders(ControloHorario-{973F2CF9-4DF4-455B-BF02-E4C27EE3C144})\Size of
Files Received on SERVER02. Performance data is unavailable. Error ID:
0x800007d5.
Last occurred: Sunday, August 03, 2008 at 5:37:06 PM (GMT0:00)
Suggested action: For information about troubleshooting this problem, see
..

4. Cannot access the local WMI repository.
Affected replicated folders: All replicated folders on this server.
Description: Due to the following error, the DFS Replication reporting
mechanism cannot access the WMI (Windows Management Instrumentation)
namespace to retrieve certain reporting information. Error ID: 0x80041002.
Last occurred: Sunday, August 03, 2008 at 5:37:06 PM (GMT0:00)
Suggested action: For information about troubleshooting WMI errors, see
WMI help.

I check The Volume D , but it isn´t full .