login script

Hi I have inherited a network that uses a script to map drives on a different domain with the use of switches for a username and password, this link has stopped working!! But I am a novice at bat files and I don?t know what variables are what can any one please help me out??? I have included a line of the code.

net use t: \\server3\Teachers$ 4dm1nst4ff /user:MHCHS\AdminStaff /yes