Mono audio tracks + stereo aux track = panning issues! Help please!

[shotgunjoe]

Hello :)

Basically I've been having a lot of problems with panning in Protools. I use Guitar Rig 4 (in stereo, maybe that's the problem?) on an aux track to record guitars onto mono audio tracks. I then render each guitar track so the guitar sound is permanent.

However, when I export these tracks into another session (as mono audio tracks) and send them through a stereo aux for EQ and compression, and pan them left and right, the problems arise.

Basically when I'm listening to it back in Protools the stereo imaging is fine - the guitars are panned dead left and right like I want them to be. However, when I render the full song, the guitars all come out centred, with a very narrow stereo image (I don't think they're dead centre, but it sounds pretty damn close to it).

Anyone have any hints on how to widen the stereo image with my guitars? It's making my mixes sound very hollow. I've tried a stereo imager on the aux track but it doesn't really sound right (like there is a difference between the levels in the left and right). Also sorry if this seems like a noobish question. Thanks a lot for your time! :)

Oh, also, all the plugins I'm using after recording are multi-mono. I don't know if when I actually record with Guitar Rig if I should be using it in mono or something.