Tempo Track Doesn't work

Hello All, I have used Cubase 5 for some years and for the first time I want to slow the last 4 or 5 bars down of an audio track. I have added a tempo track set it to ramp and put a ramp down at the end of the track all seems well the tempo in the transport section goes down but the music is unaffected. What am I doing wrong ?

I found out what the problem was double click on the audio track and click on the musical not to turn it on