Placing Pontoon Bridges - Need Help!

[Kool Kat]

Gents:

I am developing a RS scenario and need to place a pontoon bridge on the map. I've tried multiple times, in the .scn file to place the pontoon bridge, but have not been successful.

Here's what I am doing:

(1.) In scenario editor, I move my cursor to a water hex.
(2.) I click on the pontoon icon. (Top menu bar)
(3.) A pontoon dialog menu is displayed. (e.g. If cursor is "below" water hex, I click on "up" button and select "4" for strength)
(4.) I click on "ok" - but pontoon bridge does not appear on map.

Any insight / help on how to place pontoon bridges would be most appreciated!