Ruby Path Issues

I have installed ruby to my c drive and have changed the environment
variables to c:\ruby21\bin and I’m getting "system cannot find the file
specified’ in SciTE. Any solutions to this issue?

SciTE is not working anymore, forget it, use another IDE.

Found one. Thanks.

I tried out Aptana Studio, it seems like it is more tuned for rails.
What would you recommend for a good and free IDE?

Thanks