Hi, i just downloaded a .jar file and was trying to use it and it didn't work. I'm using windows 2000, jre 1.3.1. I put the file in C:\jdk1.3.1\jre\lib\ext\ and java told me that it couldn't find a class that i know is in there (i looked with forte). Then i tried to change my classpath. where do you do this? so i tried a command line i.e. set classpath=%classpath%;C:\jdk1.3.1\jre\lib\ext\the.jar; but this didn't work so i uncompressed the jar into the file and now, for some reason, it works. but if i take away the decompressed file, it doesnt. What is going on here?