If you delete the pants, select your character's body or hip node and reload them does this work? 

In general "Cross Talk" aka "Super Conforming" is a Poser Bug Exploit (DAZ Studio and Carrara intentionally set up Cross Talk to work, so don't have this issue). It works when the morphs have the same name, which is great when all you have is a single figure and their clothing in the scene but causes other problems.

When you load more than one Character into the scene Poser uses, as a solution for the bug, a suffix on the morph. This way dialing the morph on one M4 does not affect a different or multiple M4's in the scene. It is a number based on how many of that figure is loaded into the scene. 

To make Cross Talk work in Poser you, generally (and this might have changed with 2012+ with the drag and drop onto the figure acting as if you followed what's next) have to have the figure you intend to conform the second figure to, selected (either on the hip or body) before adding the pants (or other conformer) to the scene. This forces the pants to have the same suffix as the base figure, which allows Cross Talk to work. When you load a combined CR2 you do not have the base figure selected when you load the conformer so the suffixes will not match and the reason Cross Talk doesn't work.