samba - Mar 2008 - getting 0x00000057 on Vista

Hi, I'm getting 0x00000057 when trying to install a printer on Vista clients
from a Samba hosted printer server.  The packet traces shows the last
transaction is GetPrinterDriver2, but I just don't see what's invalid in
the
reponse.  I have tried 3.0.22, 3.0.26a, and 3.0.28 and they all give me the
same error.  Can someone please help?

 

Thanks!

--MingJ