Step 1:
change classpath setting in autoexec.bat on your system as follows
set path=c:\j2sdkee1.2.1\bin;%path%;
set JAVA_HOME=c:\jdk1.2.2
set J2EE_HOME=c:\j2sdkee1.2.1
set CPATH=.;%J2EE_HOME%\lib\j2ee.jar
set classpath=c:\j2sdkee1.2.1\lib\j2ee.jar;c:\j2sdkee1.2.1\lib\ejbdeployment10.jar;c:\j2sdkee1.2.1\lib\jhall.jar;%classpath%
step 2:
Go to c:\j2sdkee1.2.2\bin\userconfig.bat and make changes as follows
set JAVA_HOME=c:\jdk1.2.2
Now
test it......