Can't link Robohelp to FrameMaker

FrameMaker 10

Robohelp 9

Windows 7

Robohelp project can link to Word files but FrameMaker is grayed out. What am I doing wrong? I am recently re-aquainting myself with FrameMaker and building a proposal to implement it in my company.

Please advise a former power user now a newbie. ;-)

Thanks!