Bug: The value "unicode" for the field "external_type" is not in the selection

Hi. I recently installed Openerp and the magento intergration module. I've imported categories, but I can't seem to import products. Here's the log i get.

The value "unicode" for the field "external_type" is not in the selection

Please give me the solution.

Thanks in advance

Environment Information :
System : Windows-Vista-6.1.7600
OS Name : nt
Operating System Release : Vista
Operating System Version : 6.1.7600
Operating System Architecture : 32bit
Operating System Locale : en_US.cp1252
Python Version : 2.5.2
OpenERP-Client Version : 5.0.9
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent call last):
  File "netsvc.pyo", line 245, in dispatch
  File "netsvc.pyo", line 74, in __call__
  File "service\web_services.pyo", line 576, in execute
  File "osv\osv.pyo", line 58, in wrapper
  File "osv\osv.pyo", line 119, in execute
  File "osv\osv.pyo", line 111, in execute_cr
  File "C:\Program Files\OpenERP AllInOne\Server\addons\magentoerpconnect_generic\magerp_core.py", line 157, in sync_products
  File "C:\Program Files\OpenERP AllInOne\Server\addons\magentoerpconnect_generic\magerp_osv.py", line 87, in call
  File "C:\Program Files\OpenERP AllInOne\Server\addons\magentoerpconnect_generic\magerp_osv.py", line 60, in try_call
  File "xmlrpclib.pyo", line 1147, in __call__
  File "xmlrpclib.pyo", line 1437, in __request
  File "xmlrpclib.pyo", line 1201, in request
  File "xmlrpclib.pyo", line 1340, in _parse_response
  File "xmlrpclib.pyo", line 785, in close
ResponseError: ResponseError()

I'm using Magento 1.4.0.1 btw. I'm sure that's probably the issue but maybe there's a workaround? thanks in advance.