My AWM Scope Doesnt Have The Red Dot

Guys, for some reason, my AWM scope, R93T2 scope doesnt have the red dot at all. However, m4a1 scope all other guns with red dot sight are visible, but none of my sniper. Please HELP ((( On my HP Desktop, it work just fine. However, on my MacBookPro i installed Parallel Destop to run Crossfire, some how disabled my Red Dot for the Sniper. Thank You a TON if i can fix this.