Nudging Issue

[SoundForFilms]

Currently working on a session where nudging can be a time savior.
Synching audio for picture that is.
After reading all other nudging inquiries on the forum still there is no clear answer or solution to the issue.
I am using a MacBook Pro Mac OS X Snow Leopard 10.6.8 and the a/z box on the upper right corner is highlighted, the full region selected and I even tried splicing a region cmd+E but the unresolved issue is that no matter which nudging value I choose ( in FPS ) instead of the region being nudged, the whole selected region area is nudged !
What I need here, is to nudge the audio part inside a selected region so in loop mode, be able to fine tune the part in the desired position.
I am using ctrl + , and ctrl + . to nudge.
Any help would be much appreciated.

Aris