[Samba] AddPrinterConnection returns ERROR_INVALID_PARAMETER

[mingj]

I set up a Point-n-Print printer server with Samba3.0.28 and it works fine 
from XP, but when I try to connect and install the printer driver from Vista 
machines, it gives me 0x57 error, does anybody know why this is happening? 
I later found out it's AddPrinterConnection call failing, but I don't know 
how to go any further beyond that.

Thanks