Splinter Cell Pandora Tomorrow
 

Could someone please help me.
I have the PC offline version of this game and I am stuck on a level.
I am trying to use the FWD COMM action to make Sodono take a retinal scan. For the life of me I cannot work out how to do this. Which keyboard keys or mouse actions should I use to achieve this.
When prompted to use the retina scan while I am holding him, he takes the scan but access is denied, I think because I cannot use the FWD COMM interaction.
Thank you

Aircooled