SUA issues - user name mapping?

Trying to map NFS share from Vista Enterprise to Solaris, & the uid/
gid are not being set correctly (at all?). Using Windows XP & SFU
3.5, the old (working) command used to be:

"c:\sfu\common\mount -o pcnfs=servername -u:user -pass \\nfsserver
\nfsshare driveletter:"

But now, we can't seem to make SUA work. We're running Solaris 10 &
OpenLDAP. I've tried putting our server name into both the fields of
the "Identity mapping source:" options, & end up with the same
result. Mounting from the command line, the system will report that
the "command completed successfully," & the drive will show up, but
when accessed, the contents are blank.

When I look at the mapped share's NFS Mount Options, under user
authentication, I can see that my UID & Primary GID are both set to
"2," which is incorrect. Additionally, we're getting an error on the
server side:

"nfssrv: [ID 734524 kern.notice] NOTICE: nfs_server: client clientname
(ipaddress) sent wrong authentication for /nfsshare"

I guess my questions are: what am I missing to make this work? and:
if it used to work with WinXP & SFU, why wouldn't it work with Vista &
SUA?