user cannot run Alice on Vista but administrator can

Hello
I have a lab on which I have installed Vista (no service pack). I have users who have read and read/execute permissions on the Alice folder. A user cannot run Alice. Even when I give Authenticated Users the Full Control permission on alice, a user cannot run Alice. Note that the machine's local Administrator can run Alice.
Please let me know what I can do. Below is the error message.

Alice version: 2.0 04/05/2005

os.name: Windows NT (unknown)

os.version: 6.0

os.arch: x86

java.vm.name: Java HotSpot(TM) Client VM

java.vm.version: 1.3.1_10-b03

user.dir: C:\Program Files\Alice\Required



Throwable that caused the error:

java.lang.NullPointerException

at edu.cmu.cs.stage3.alice.authoringtool.galleryviewe r.GalleryViewer.<init>(GalleryViewer.java:1069)

at edu.cmu.cs.stage3.alice.authoringtool.editors.scen eeditor.CameraViewPanel.guiInit(CameraViewPanel.ja va:769)

at edu.cmu.cs.stage3.alice.authoringtool.editors.scen eeditor.CameraViewPanel.<init>(CameraViewPanel.jav a:744)

at edu.cmu.cs.stage3.alice.authoringtool.editors.scen eeditor.SceneEditor.<init>(SceneEditor.java:349)

at edu.cmu.cs.stage3.alice.authoringtool.JAliceFrame. guiInit(JAliceFrame.java:156)

at edu.cmu.cs.stage3.alice.authoringtool.JAliceFrame. <init>(JAliceFrame.java:71)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringToo l.mainInit(AuthoringTool.java:456)

at edu.cmu.cs.stage3.alice.authoringtool.AuthoringToo l.<init>(AuthoringTool.java:408)

at edu.cmu.cs.stage3.alice.authoringtool.JAlice.main( JAlice.java:123)




Thanks,
Crypto