Unable to load world (my final!)

Please Help!
I was working on my final on Alice, and I finished it. I ran the debugger and my program worked lovely. So I saved and closed. Then, about 5 minutes later, I tried to open it and to no avail. I've tried to open it many different ways but it just won't load it. My error code is below. A response would be MUCH appreciated. Thanks!
P.S. the file size is 5.12MB








Unable to load world




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:\CourseTechnology\Alice\Required



Throwable that caused the error:

edu.cmu.cs.stage3.alice.core.IllegalNameValueExcep tion: Unfortunately, something else in this world is already named "index," so you can't use that name here.

at edu.cmu.cs.stage3.alice.core.Element.checkForNameC ollision(Element.java:221)

at edu.cmu.cs.stage3.alice.core.Element.internalSetPa rent(Element.java:683)

at edu.cmu.cs.stage3.alice.core.Element.insertChildAt (Element.java:1053)

at edu.cmu.cs.stage3.alice.core.Element.addChild(Elem ent.java:1061)

at edu.cmu.cs.stage3.alice.core.Element.setParent(Ele ment.java:644)

at edu.cmu.cs.stage3.alice.core.response.LoopNInOrder .loadCompleted(LoopNInOrder.java:57)

at edu.cmu.cs.stage3.alice.core.Element.loadCompleted (Element.java:1432)

at edu.cmu.cs.stage3.alice.core.Element.loadCompleted (Element.java:1432)

at edu.cmu.cs.stage3.alice.core.Element.loadCompleted (Element.java:1432)

at edu.cmu.cs.stage3.alice.core.Element.loadCompleted (Element.java:1432)

at edu.cmu.cs.stage3.alice.core.Element.loadCompleted (Element.java:1432)

at edu.cmu.cs.stage3.alice.core.Element.load(Element. java:1557)

at edu.cmu.cs.stage3.alice.authoringtool.dialog.LoadE lementProgressPane.construct(LoadElementProgressPa ne.java:36)

at edu.cmu.cs.stage3.progress.ProgressPane$2.run(Prog ressPane.java:82)

at java.lang.Thread.run(Unknown Source)