This gives me an error:
  File "/afs/cern.ch/user/j/jbadillo/WmAgentScripts/WMCoreService/WMStatsClient.py", line 5, in <module>
    from WMCoreService.CouchClient import CouchServer
ImportError: No module named WMCoreService.CouchClient

I think you don't need to import WMCoreService. (since you are in the same package)