Need help with ifmember and group mapping on login script

Hello,
    I really appreciate anyones help on this, i was able to create a login script in notepad as a batch file and test it for user's personal home fodlers and shared folders. but im having huge issue with assigning groups to their groups folder, i know you can't do that in notepad as a batch file without using ifmember.exe. My problem is Idont know how to work ifmember.exe. i installed and copied the ifmember executable to the same path that the script is located in my PDC. as required, and thought i enter the right commands but when i run it nothing happens, just my original commands works. Not the ifmember. Please help
here is a copy of my test.bat file

REM *** Login Script for Company Users ***

net use i: /delete
net use g: /delete
net use h: /delete
net use m: /delete
net use n: /delete

net use g: \\servername-fs03\prog
net use h: \\servername-fs03\data
net use i: \\servername-fs02\%username%$
net use m: \\servername-fs03\data
net use n: \\servername-fs01\apps

ifmember DomainAdmins
if not errorlevel 1 goto EndDomainAdmins
net use z: \\servername-fs03\data
:EndDomainAdmins


REM call \\empire-dc01\netlogon\accpac_forms.bat
REM call \\empire-dc01\netlogon\access.bat

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after running this the only drives that gets mapped are the G,H,I,M,N  no Z drive which is the ifmember command.
Thank you
Eddie