datetime is causing error with pyodbc/freeTDS when accessing MSSQL

Hi,
I am getting an error accessing MSSQL database using pyodbc/FreeTDS
driver.  Looks like it has something to do with datetime datatype.
If I delete the "created_at" column (which has datetime data type)
from my table then
the same code will work. Any suggestion for further debugging?  Thanks
in advance.   -- TN

pyodbc:  pyodbc-2.1.8-py2.5-linux-x86_64.egg
TDS:      freetds-0.82
MSSQL 2005

here is the python code:
==================
import pyodbc
conn =
pyodbc.connect("DRIVER={FreeTDS};SERVER=myserver;DATABASE=mydatabase;PORT=1435;UID=MYUSER;PWD=MYPASS1")
cursor = conn.cursor()
cursor.execute("select * from test_product")
print cursor.fetchone()

Here is the error:
============
Traceback (most recent call last):
  File "testodbc2.py", line 7, in <module>
    print cursor.fetchone()
pyodbc.Error: ('HY000', 'The driver did not supply an error!')

Here is the "test_product" database table:
===============
Column name      Data Type             Value
device                 varchar(8)              xyz
revision               varchar(8)              ttt
process               varchar(10)            abc
created_at            datetime                4/26/2011 12:20:00 PM