Connecting to a firebird superserver on windows using sqlalchemy

I am trying to connect to a firebird super server.I have the fdb package installed. I am trying ``` from sqlalchemy import create_engine engine = create_engine ('localhost:c:\fdbb\school.fdb') ``` I get this error ``` Traceback (most recent call last): File "<stdin>", line 1, in <module> File "build\bdist.win32\egg\sqlalchemy\engine\__init__.py", line 332, in creat e_engine File "build\bdist.win32\egg\sqlalchemy\engine\strategies.py", line 48, in crea te File "build\bdist.win32\egg\sqlalchemy\engine\url.py", line 154, in make_url File "build\bdist.win32\egg\sqlalchemy\engine\url.py", line 196, in _parse_rfc 1738_args sqlalchemy.exc.ArgumentError: Could not parse rfc1738 URL from string 'localhost :c:♀dbb\school.fdb' ``` Am i doing this right?.