Midi loops when imported into arrange window sound pretty lifeless - please help

Hi

I am currently using Logic pro 9 and when I play the orchestral midi loops in the loop window they sound really lush. When I drag them into the arrnage window they sound really dull. I think I have changed a master setting somewhere along the line but don't know how to restore it.

It doesn't happen with the audio loops

I am on Mac OS x 10.6.8

any suggestions welcome

Rhythmseeds