[Rails] buildr Windows 7 64 bit problems

Preface: I'm not overly familiar with the inner workings of RoR, so I
apologize for my relatively superficial knowledge upfront

I have a new 64 bit Windows 7 machine.

My dev environment on my old machine which functions fine (sans a
functioning monitor -- thus the new machine), I have the following
installed and functioning well:
Ruby 1.8.6 using the Windows MSI installer
Buildr 1.3.3
rails 2.3.2
jdk 1.6.023 (32bit) with JAVA_HOME set
RUBY_OPT is set to -rubygems

I tried to install the above environment on the new machine with
failures. Initially, when I did a standard install of the above
without rolling back to earlier Buildr versions and using Ruby 1.9.x,
I would get failures in the deployment of the jvm. So I tried to
delete the 1.9.x install and go back to the 1.8.6 install. I also
tried rolling back some of the gems, buildr specifically, to try and
replicate the environment above. The problem is that I am not sure I
am deleting old gems correctly or even that I have uninstalled 1.8.6
correctly. I get the feeling that simply deleting the old 1.9.x
folder is not cutting it and there are gems stored in places that I am
not understanding.

Any help would be appreciated. I know I am a little short on details,
but part of that is due to the fact that I have tried many different
permutations of different approaches without success.

Merry Christmas,

Ram

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