Going from 2000 to 2002 OS problem ?

[RandyWS6]

I'm having problems with the cross over,Ive coped and pasted every thing i can,But i get a flashing check engine light (BUT) there's no code, Whats up with that. And between shifts (M6) i go extremely lean 19.5AFR but only between shifts ,at WOT my AFR is fluctuating from WB 12.2 to 12.9 ,The 2000 tune didn't do this at all it stade at 12.8 WB AFR and its the one i used to migrate over in the 2002 OS. I have the log file of a WOT run and the tuning files (2000) and (2002) OS. that has the 2000 OS in it. can some one look at this and tell me what the problem is. I just cant figure it out. I'm going to haft to put my 2000 tune file back in ,but i shore hate to.