Torchedmedic

Hello aviators, i just got the F-15E the other day and have been reading up the manual and doing the training missions available to get practical applications of the concepts in the manuals. Something I noticed today doing the A/A mission is that the radar is not sweeping. What I mean is that when I watch videos, the carets on the left and bottom of the display are sweeping up/down, and right/left however mine are not. I assume that the training mission would have everything set up correctly so that it should work, and from what I can tell the radar is on and in the correct mode, A/A master mode is selected, and I am able to move the target selector (for lack of a better term as I can't remember it right now) on the MFD. I do not see the radar returns on the screen because the carets are centered on the axis and not moving. Is this a known issue, and has anybody had this issue before and know a way to solve it? Thanks for any help provided!