32-bit and 64-bit JDKs can't co-exist on windows-itanium for 1.4.2_13

The 64-bit and 32-bit bundles for jdk 1.4.2_11 b02 can't be both installed at the same time. The separate installation goes fine. But if one bundle is installed, the other one can't be installed. Program Maintenance dialog is appeared instead of intsallation dialog. See attached screen shot for details.

The same behaviour is seen for jdk 1.4.2_12 - not a regression.

System information:

C:\>uname -a
Windows_NT HPZX 5 02 2200

How to reproduce:

Copy the 32-bit and 64-bit bundles to WinXP/Itanium machine. Install one, then try to install another.

You can use the UR group test machine for verifivation. Machine details are in comments.

Thanks for your attention.