jar/exe - Error: Could not find or load main class

Hi.

When I put everything by myself in a folder it works:

But I have to add something in my bat file or else it won’t work because it can’t find lwjgl64.

[quote]-Djava.library.path=.\lwjgl\native\windows
[/quote]

Now I wanted to only make one jar file or exe. I tried JarSplice and Launch4J.
But both times I get a error message:

I remember I had this same problem some years ago but I forgot how I solved it.
My Project looks like this: