Support Request: Need install help

I would if i could, the screen just goes black and stays black so can't get an error log, unless there is another way, then do tell

Mods loaded: 1
ModLoader Beta 1.7.3

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.

--- BEGIN ERROR REPORT e9df3db --------
Generated 10/07/11 15:45

Minecraft: Minecraft Beta 1.7.3
OS: Windows XP (x86) version 5.1
Java: 1.6.0_26, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: GeForce 7900 GT/GTO/PCI/SSE2 version 2.1.2, NVIDIA Corporation

java.lang.NoClassDefFoundError: ModSaver
at fd.D(World.java:280)
at fd.a(World.java:267)
at fd.l(World.java:2049)
at net.minecraft.client.Minecraft.k(SourceFile:1498)
at net.minecraft.client.Minecraft.run(SourceFile:754)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: ModSaver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
--- END ERROR REPORT 24325d5d ----------

Think you can help?

just delete this thread problem solved
thank you very much