samba - Apr 2005 - findsmb, windows xp sp2 not listed?

Hi,

findsmb doesnt list the only xp machine in the network...

smbclient -NL 192.168.10.10 shows:

Anonymous login successful
Domain=[ARBEITSGRUPPE] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager]

        Sharename       Type      Comment
        ---------       ----      -------
Error returning browse list: NT_STATUS_ACCESS_DENIED
session request to 192.168.10.10 failed (Called name not present)
session request to 192 failed (Called name not present)
Anonymous login successful
Domain=[ARBEITSGRUPPE] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager]

        Server               Comment
        ---------            -------
        TEST

        Workgroup            Master
        ---------            -------
        ARBEITSGRUPPE        TEST
        HEAVY_METAL          FILESERVER


i can play music from the samba server on the xp machine...but why isnt 
the machine listed by findsmb?

regards
julius