Also make sure that layers PNTS, DESC and ELEV are turned on. You say "little X with elevations", technical name for those puppies is "spot shots", so also check that layers PNTS (The "X") and another layer - either ELEV or maybe SPOTS , is turned on.
The old Softdesk point blocks are not AEC object, but the new LDD points may be, but if you are both on LDD, you should see tham.
DANG, now I'm confused!!