Solaris Problem

I made an executable jar. Tested everything on NT and it ran fine, but tested it on Solaris and it complained about not finding the Main-Class in my manifest file. Well, it's in there and it seems to be fine on NT (regardless of which directory i put it in). Does anybody know what the problem might be? It bothers me because I suspect it will be tested on Solaris.
With Respect,
Matt DeLacey

WARNING!!!
I'm sure many of you already know this, but Solaris is case
sensitive. That was my problem. My file got copied over as MATT.JAR and I was typing java -jar matt.jar...on NT it works like a charm, but on Solaris it failed. Everyone should make sure that they give command line guidelines that are case sensitive or else they are likely to fail for the tester!!!
With Respect,
matt