Issues when loading the models provided by microsoft zenpack

[aseques]

Since I installed the zenpack 2.1.0 on our zenoss install (2.4.5) there are some errors that are reported on the log the make winrm unusable (only the other models are discovered)

2014-08-04 09:27:06,726 ERROR zen.ZenModeler: ['Traceback (most recent call last):', '  File "/opt/zenoss/Products/DataCollector/Plugins.py", line 100, in create', '    self.modPath)', '  File "/opt/zenoss/Products/DataCollector/Plugins.py", line 192, in importPlugin', '    return importClass(modPath)', '  File "/opt/zenoss/Products/ZenUtils/Utils.py", line 429, in importClass', '    raise ex', 'ImportError: No module named modeler.plugins.zenoss.winrm.IIS']
2014-08-04 09:27:06,726 ERROR zen.ZenModeler: Due to import errors, removing the ZenPacks.zenoss.Microsoft.Windows.modeler.plugins.zenoss.winrm.IIS plugin from this collection cycle.

The same thing happens with the rest of the winrm models, see the full log here ( https://gist.github.com/aseques/28fb6b3d4a160ebf43cb)
Any clue on this?