Ruby problem(bug)- in rake gem

Question

i am running ruby 1.9.2p0 on rails on windows OS with rubymine 3.1.1.

i use it for גseveral weeks.

a few days ago- i tried to run my project from rubymine and the console notification was: "Could not find rake-0.8.7 in any of the sources

Process finished with exit code 7"

i googled it and i found reference to this problem in several places. the solution repeated most often was to delete the non-versioned "rake.gemspec" file. i tried this solution but the problem is not resolved, it still says the same notification.

i trying to solve this problem for several days!!! please help me if you know how!!!

thanks a lot in advanced!