>>>I never tried with XP, only Win7.
>>>
>>Windows 7 and SQL Server Driver works fine for me for varchar(max) columns. It is the SQL Server Native client that has problem.
>
>What about Date and DateTime fields, do they work fine with SQL Server Driver? I think I remember that what works with one does not work for the other, but I might be wrong (no surprises there).

I think date and time types do not work with the old SQL Server driver. However, we're only using DATETIME type, so it's not an issue for us.