I'm far from being an expert but, in my limited experience, it's usually due to a mismatch between the java runtime version you are using and the one the program expects.

1.6.0_03 is a fairly recent version - do the LCW files include an older version?

Far from a guaranteed fix but worth checking.

Mike

campaneg wrote:

Hey all i just recently downloaded LCW to be able to play with a few
friends that are overseas. Now i followed the directions, installed
java, went into the lcw batch file and posted C:\Program
Files\Java\jre1.6.0_03\bin\java (that's where it's installed on my
comp) And when i go to run lcw.jar i get an error message. Java
Virtual Machine Launcher Failed to load Main0Class manifest attrubute
from C:\....Desktop\LCW\lcw.jar

Anyone know what i'm doing wrong?