logon script?

im having and issue with my our network logon script that welcomes them to the network and tells them that the script is running but in the backgound user drives are being mapped and printers also are being installed, but heres the catch the script only wants to run correctly on domain user accounts and not domain admin accounts if i were to run the script on a user that has any sort of administrative account or even if i give a user admin rights to their pc there drives wont map but all the other tasks work. Any ideas. This makes it hard for me to allow users to install software on a computer if they need an update if the logon script dosnt run correctly on a admin account. any help will be appreciated!