I'm unable to get web2py to connect to mssql. 

```
<type 'exceptions.RuntimeError'>(Failure to connect, tried 5 times:
'NoneType' object has no attribute 'connect')

```

My connection string is:

```
db = DAL('mssql://testUser:password1@localhost/testDB') 

```

Environment  

  Windows Server 2008 R2, 64-bit operating system  

  SQL Server 2008 R2, local.  

  Web2py: source code install version 1.99.2 (2011-09-26 06:55:33) stable.  

  pyodbc  

  Python 2.7.2

I've tested that I can connect using the pyodbc. The following code works:

```
import pyodbc
cnxn = pyodbc.connect('DRIVER={SQL Server};SERVER=localhost;DATABASE=testDB;UID=testUser;PWD=password1')
cursor = cnxn.cursor()
cursor.execute("select * from tbUsers")
rows = cursor.fetchall()
for row in rows:
  print row

```

Thanks for your time.

Corey.