Cant log into SBS 2003 server with DOS/Barts boot disk

i have a PXE boot server running barts boot disk to log onto windows sbs server 2003 to automatically ghost 16 machines, now this has just been setup on the 2003 server and was running perfectly on a windows XP pro machine previously, but I cannot get this to work on the 2003 box, the logon fails all the time, I have setup a test user that is an admin with the passord "test" everytime i try to log on i cant access shares or anything, it comes up saying  password was incorrect for\\server\share please enter password:
then i put in the password again and i get error 5  access denied, the version of dos on the Barts Boot disk does not support the /user command so i cant use "net use M: \\server\share "test"  /user:test as it is an unrecognised command, the boot disk does have a section to put in a username, password, machine name and workgroup, which is currently setup to run before the mapping the network drive command, no matter what combinations I have used with this i get no luck, I really need to get this working, does anyone have experience with this or have got barts boot disk to work with a 2003 server.
I have tried enabling the guest account, giving anonamous access to the shares, played arround with a few DC GP settings with no luck.
I can see the attempts in the securiity log but it says user failed with incorrect username and password, even when i try to access a share with anonamous access eg.dfs$ for instance it looks like it lets me in but then pops up with the incorrect password for \\server\share and to type it again.