Just "reamp" this sweep through your Loop Return:
Here<----------- (Note: It's sampled @ 96khz)
Make sure that you are not clipping the signal within the amp. ( Easy: If it sounds like a square wave, the signal is too hot).
Post the result here and I'll take care of the deconvolving process for you or use
voxengo deconvolver like DSS3 said.
Cheers!