javaHome is invalid: c:\java\j2sk1.4.0_01

Why am I getting the subject error message?  What do I need to
change....

This occurs after I have started jswat (command file below)and try to
start the debugger. 

Things I have done:
1. re-installed the JDK in the subject directory, same as where it was
before I re-installed
2. installed jswat 2.10


I was using 2.8 before I installed 2.10 and re-installed the JDK

I am invoking jswat from a .bat file containing: java
com.bluemarsh.jswat.Main

Thanks,

Roy