SQL Error: The login packet used to open...

Hello again,
Now that I have FreeTDS working on Leopard Server after installing Entropy,
I am having a connection problem using PHP.

When I connect using PHP, the connection errors and this event show up on my
SQL 2005 server:

Event Type: Error
Event Source: MSSQLSERVER
Event Category: (4)
Event ID: 17832
Date: 9/25/2009
Time: 11:29:16 AM
User: N/A
Computer: AC-501
Description:
The login packet used to open the connection is structurally invalid; the
connection has been closed. Please contact the vendor of the client
library.

Connecting using tsql works fine.

Thanks again,

Nikhil