Opening images in CS5 from Lightroom 4

Hi,

Can someone explain why, when I edit an image from Lightroom in CS5 ( or other plugins ), that when I save it and go back to Lightroom, the edited image is not there.

The original is there but not the edited version. It will say 2 x 2 for example, so I know the edited version is there somewhere, but I cannot see it in the filmstrip.

The only way I can see the edited image is if I close Lightroom down and restart it. Then it appears next to the original. Obviously that is not ideal.

I would appreciate any help, I hope its just a setting somewhere.

Thanks,

Dave.