Working with two tempos

[shacke]

Help please! I just realised that have two tempos on a song i'm working on. I only noticed it when I tried to add a new part and the click track wasn't in time. It must have happened when I changed the tempo but somewhere along the timeline the old tempo remained. So the song starts at 86bpm and after 6 bars it changes to 88bpm and it looks like it gradually goes back to 86bpm at the end. The song should be 86bpm. I've tried using elastic audio but it isn't working, maybe i'm not doing it right? Does anyone have any suggestions please? Is it something I can fix in PT? I've laid loads of live instruments and vocals and dread having to do it all again. I'm running PT10 on Mountain Lion. Thanks.