I'm having problems calibrating my Guitar Rig 2 when I have it setup as...

I'm having problems calibrating my Guitar Rig 2 when I have it setup as a plug-in in Pro tools.

This is a known issue with Guitar Rig 2 and currently Native Instruments is working on it. However, there is a workaround that you can do.
Simply quit Pro Tools and start Guitar Rig 2 as a standalone program then do your calibration. Then the next time you use guitar rig as a plug-in it will be fine.

Look for an update on NI's website to resolve this.

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