Problem with -- Rails gem isn't activated in RubyMine's Gem Manager for module

Hi,
I am rather new  to Ruby Mine, and I am having problems in the beginning :D

I wanted to ask something, as I am having problems running applications on Ruby Mine 3.0

I have Rails application, and I have launched Ruby Mine 3.0 so I could debug my application in it.  (My application is fully functional outside Ruby Mine)
Ok. I have lanched the application and added to project. After adding a project I ran Run -> Debug and a message showed  up saying:  Rails gem isn't activated in RubyMine's Gem Manager for module

I have searched the internet looking for the solution , but I can't find the answer.

I am running on Windows 7, ruby 1.8.7 and Rails 2.3.8

My gem menager looks like this:


And my gem environment looks like this:



Please help.

Aleks.