Topic: Rake File Problem

I'm really a newbie with RoR.
But I need to deploy this app as soon as possible.

RoR App: Fedena
RoR Ver: 1.8.7

When I type any rake commands I always encounter this problem:

rake aborted!
uninitialized constant ActiveSupport::Dependencies::Mutex

Locally, I did find the solution for this problem by downgrading my Rake Gem version from 0.9.2 to 0.8.7.. The problem is installing it on CPane(onlinel. Same error but the thing is admin&support of Hostgator are not able to downgrade the gem and they don't have that kind of support for RoR.

Can anyone help me with the scripting?