I agree with TDK; autocam can be a pain. You can try this to do it manually:
rem Standard Setup Code
sync on : sync rate 0 : hide mouse
set text font "arial" : set text size 12 : set text transparent
set display mode 1280, 1024,32
autocam off
load object "C:\Users\Jason\Desktop\My DBPro\Glass\TEST.3ds",10
Global x# as float
global y# as float
global z# as float
x# = 0
y# = -50
z# = 0
position object 10,x#,y#,z#
position camera x#,y#,z#
move camera -150
move camera up 20
point camera x#,y#,z#
while mouseclick() = 0
if leftkey()
turn object left 10,0.2
endif
if rightkey()
turn object right 10,0.2
endif
if upkey() then move camera 0.2
if downkey() then move camera -0.2
text 10,10,"FPS: " + str$(screen fps())
text 100,100,"hello"
sync
endwhile
delete object 10
show mouse
end