Room Works gone

Hi. I’m trying to do some work on the road and I just load my cubase projects from my Mac G5 with Cubase 4.5, OS 10.4.11, to my macbook pro (intel) with Cubase Studio 4.5 but the reverb plug ins are gone. They seem to be in the application but don’t show in the FX tracks, neither in plug ins information. I check the actualization button end nothing happens. They refuse to show up. Does anybody have these issue?
Thanks in advance.