Nascar 08 - Stuck at 99%

I don't know what to do to get the last achievement. I'm stuck at 99% and I can not figure out what to do to get the last 1% Any suggestions?

i found this:

You must complete all modes of play including, Licenses, Toyota Challenges, Contracts, Driver Badges, and a full season in Chase mode.

don't know if it helps or not

also this:

I was also trying to finish this achievement yesterday and had the same thing happen to me, stuck at 99% with all the other Achievements done. I remembered that I completed the Car of Tomorrow Season myself, but did not want to do the Nextel Cup Season, since I was already doing the Chase Season. Therefore, I simulated the whole season using Jimmie Johnson and won (got the Achievement - Sprint Reward).

Last night, I decided to complete this again. I once again used Jimmie Johnson and simulated to the last race. I made sure I had a points lead (just reset if you are getting bad simulation results). I qualified and won the last race and received the Achievement for 100% Completion (All or Nothing) after I hit continue from the menu after the race was over. You may want to give this a try.

I think I tried that already, but I'll do it once again just to make sure. Thanks for the suggestions :)

AParrette z3r0 said:Oh thank you thank you thank you....that got if for me. I actually didn't get it after I clicked continue...I had to go back to the "Game Progress" to unlock it after I completed the season.