Error Display while sending message in Plone 4.1

Error Display while sending message in Plone 4.1

I am developing a website in Plone 4.1 and have added a Instant message
addon named "Product.IMS" to it but when I try to send message following
error display...
Module ZPublisher.Publish, line 126, in publish
Module ZPublisher.mapply, line 77, in mapply
Module ZPublisher.Publish, line 46, in call_object
Module Products.IMS.browser.views, line 236, in call
Module zope.formlib.form, line 795, in call
Module five.formlib.formbase, line 50, in update
Module zope.formlib.form, line 776, in update
Module zope.formlib.form, line 620, in success
Module Products.IMS.browser.views, line 242, in action_send
Module Products.IMS.browser.views, line 247, in _sendMessage
Module Products.IMS.adapter, line 121, in sendMessage
Module Products.IMS.adapter, line 95, in _getMessageFolder
Module zope.interface.declarations, line 935, in alsoProvides
Module zope.interface.declarations, line 867, in directlyProvides
AttributeError: 'NoneType' object has no attribute 'provides
Please anyone tell me in which location I find these error...!!!