BMAP *mybullet = "missile2.bmp";

has to be a PANEL*:
PANEL* mybullet =
{
layer=3;
flags=OVERLAY,SHOW;
bmap="missile2.bmp";
}

Gamestudio: A7.82 Commercial/A8 Commercial
System specs (Laptop):
Windows 7 64bit
DirectX v10.1
Intel Core i7-720QM CPU @ 1,60 GHz
4GB DDR2 Ram
NVIDIA GeForce GT 230M (1024MB)