Framemaker 9 and 7.2 Compatibility

Hello,

I use Framemaker for managing the operational manual of my airline and I have big problem regarding to the compatibilty of FM 9 and 7.2.

Our service provider works on my framemaker files with the version 9.0.

But I work with the version 7.2 and I can't open the files as it has been saved in FM 9.

Is someone have an idea to open this FM 9 files into FM 7.2 ?

Thank you in advance.