[Samba] net group question

[mjynht]

I groupapped the domadmins group in linux to ntgroup="Domain Admins" but instead of mapping to the SID number ending in 512 it's creating a new SID number endind in 2025 mapped to domadmins...

Does anybody knows why??? It worked in the previous server.

This is the command I execute

net groupmap add ntgroup="Domain Admins" unixgroup=domadmin

If I use the rid=512 option I get "   adding entry for group domadmins failed!  "

Please help...