Help: could not do gems installation

I am on windows xp. I also have netbeans installed which has ruby

Installation of gems through netbeans works okay. But the GUI does not
show me some of the gems I wanted to install. So I tried

       gem install activerecord-sqlserver-adapter

which gives me the following message

ERROR: While executing gem … (Gem::RemoteFetcher::FetchError)
Bad file descriptor - connect(2)(Errno::EBADF)

I am behind a firewall so I tried -p option too. I get a different

        gem install activerecord-sqlserver-adapter -p

ERROR: While executing gem … (NoMethodError)
undefined method `[]=’ for #Gem::ConfigFile:0x2d5dd68

Netbeans website suggested the following alternative.

       jruby -S gem install activerecord-sqlserver-adapter

This returns similar errors.

I am not an expert rubyist. And I am not sure how to get activerecord-
sqlserver-adapter installed. Any help is greatly appreciated.

Thank you for your time,