how to send a remote keystoke like f9 to remote PC

Hi I am trying to use a program in my remote PC that requires me to press the F9 key to produce a report , but when I press f9 my teamviewer jumps out to the start screen of my local PC , I have switched on (ticked) 'send key combinations' in the 'Actions' tab of teamviewer, but I feel as if I must now somehow send the f9 request to the remote pc .

I have searched for over an hour to try and resolve but getting nowhere, any help would be much appreciated thanks