dambusters

i have downloaded the dambuster mission on page 16 of the cfs1 missions and campaigns section for cfs1 and have all the right aircraft and scenery etc. but it still isn't working, can any one help me?
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hagar, whats a 3rd party aircraft?
I was getting frustrated & confused when I wrote my previous reply. I tried again & finally managed to play a mission. The way this package is configured makes it far too complicated for me to explain. This seems a shame as the author appears to have taken a lot of time & trouble over it.
Well then since you know the basic idea behind the mission maybe you can re-create a package of your own for all to fly
Grumpy's Dambusters, has a nice ring too it