cannot find file jli.dll

I've been running through the tutorial to learn the Java Language... have been trying to get started and cannot get the javac command to work in command promt. I recieve this error:

http://i131.photobucket.com/albums/p307/liioadin/xgfxfgjettre.jpg

any clues? i posted on the New to java forum but no one seems to have any idea so i'm trying here instead.

Also to be clear i've redownloaded and reinstalled the program several times now.

[464 byte] By [liioadina] at [2007-11-26 14:29:52]