link timeline and edit selection not working

[binetron]

pro tools LE v.7.4 intel imac 2.4core2 dual os x 10.4.10

Hi, link timeline and edit selection is not working!!!

help anyone.

when I select a region, I want it to stay selected and play that selection.
link timeline and edit selection is for controlling this.
It's not working. It de-selects my selection and plays from it's last stopping point.


also a weird lag is occuring when I click anywhere to move the selection point.
I have to click and hold for a second to get the cursor to move to that point.
This is not a cpu issue. Everything system wise, has been optimized correctly.


I've reinstalled twice.

help please anyone.