BAS 4.5.1 doesn't work with JDK 1.4 beta!

I am developing EJB with JBuilder 5 and have JDK 1.4 beta installed on my machine. So I installed Borland AppServer 4.5, but when I try to start it, here comes a problem:

BAS 4.5 only support JDK up to 1.3.0 not higher! When I start it I got a bunch of error msg . Since I don't want to uninstall Jdk1.4, I try to modified the registry: such as set Java Development Kit/Current Version to 1.3 and change keys named 1.4 to _1.4, but it doesn't work! and when I run run java on console, it reports that the CurrentVersion should be 1.4, but currently it is 1.3 error......en..What do you think? Do I have to uninstall Jdk1.4?

[645 byte] By [cop4587] at [2007-9-26 3:12:11]