[REL] Question - How to show RAOBF rings on periscope

Hi all...I'm wondering if someone might be able to help me....I am trying to show/activate my RAOBF rings on my attack periscope but nothing happens...I watched an excellent RAOBF video by Bstank06 and all he did was to click on the bottom of the RAOBF ring above the periscope view, and voila, it appeared...when I try to click on the bottom of the RAOBF ring that is showing, my mouse pointer just disappears and gives me free view on the periscope...then when I click on the left mouse button again, my mouse pointer appears again...can't seem to figure it out guys!
I'm using SH3 with GWX and Magui F..

Any advice would be gratefully appreciated...