ak3awad

i'm new so i hope u bare with me a little. when i played red alert 2 the normal one not yuri on skermish mode, the command button didn't work in a lot of places. like i couldn't open my base, couldn't make any of my units attack anything, and couldn't get the engenner inside the oil plant so i just wanna know is it something with my game setting or is it the game it self and how do i fix it plz.