Retrieving varchar(max) and varbinary(max) fields with VFP9

I have a test database that contains a varbinary(max) field and a varchar(max) field.

when I do a

Select * from test where id = xx

I get the expected results if my connection string uses

'driver=SQL Server;Server'

but these two fields return no data if I use

'driver=SQL Native Client'

the other fields in the record come back with no problems.

Is there anything special I need to do to retrieve these types of fields?

sorry, typo:

The first driver of course it just

'driver= SQL Server'