RadRails: Rake Tasks dropdown menu shows empty

Hi list,

I'm having trouble with my RadRails. I have Instant Rails and on
Aptana, I set up the "installed interpreters" to C:\InstantRails\ruby
and the type is "standard VM". On the Rake Tasks tab, the dropdown
list shows nothing. I tried to install ruby and rails (using gem) and
change the "installed interpreters" to C:\ruby and i still have the
same problem. I have no idea to make it fixed. Please help.

Thanks,

Adinda P