jsonrpc_getwork WARNING Error importing 'midstate' module; work will not provide midstates

>>> Traceback (most recent call last):
  File "eloipool.py", line 915, in <module>
    MM.start()
  File "/var/www/eloipool/merklemaker.py", line 697, in start
    self._prepare()
  File "/var/www/eloipool/merklemaker.py", line 120, in _prepare
    TS['access'] = URI2Access(TS['uri'])
  File "/var/www/eloipool/merklemaker.py", line 110, in URI2Access
    access = jsonrpc.ServiceProxy(uri)
AttributeError: 'module' object has no attribute 'ServiceProxy'

Actually I get this error now that I fixed midstate'