Redcar conflict netbeans

Hi

I had a IDE netbeans now I have installed red car but after
installing redcar my NETBEANS not working so I want to remove redcar
from my local machine(ubuntu 10.10)

when I put this in console:

sudo gem uninstall redcar

I got

WARNING: Invalid .gemspec format in
‘/usr/lib/ruby/gems/1.8/specifications/redcar-0.13.gemspec’
ERROR: While executing gem … (Gem::InstallError)
cannot uninstall, check gem list -d redcar

so how can I uninstall redcar

PLEASE HELP

Thanks in Advance

Kausik

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