Sorry to hear you can't get it working. You did upload the latest CROM for the pred before you tried loading, correct? After you've uploaded the CROM, then you'll need to upload the truck update. Once you've uploaded the truck updpate then you should be able to take it to the truck and upload the latest update to the truck's PCM. After that, then you should be able to install whatever tune you want.
I did all of those steps and then it came back with a new PCM and TCM code, said that I need to contact Diablo tech person, I will call them first thing Monday morning. From reviewing the forums at Diablo I don't think it will be serious. Might have to down load a different version of something ?
Thanks for the help.
2005 Dodge Ram Hemi SLT QC 4x4,Diablo Predator,Stainless Steel Dual Exhaust with Chrome Cat Backs.