Before rebooting, backup your "\winnt\system32\ras\switch.inf" file,
because you need to overwrite it with the following script:
---- BEGIN switch.inf file (for use with tdl.com) -----
[Auto-login for NT]
; Wait until we get the "login:" prompt
COMMAND=
OK=<match>"ogin:"
LOOP=<ignore>
; Give the account and wait for "password:" prompt
COMMAND=<username><cr>
OK=<match>"assword:"
LOOP=<ignore>
; Give the password and ignore response (we're done)
COMMAND=<password><cr>
OK=<ignore>
----End switch.inf----