Aircraft parts disappear behind prop

Greetings All,
Working on a UAV using FS Design Studio and am having a problem with a couple of aircraft parts. When I bring the model into MSFS-9 and pan my view, some of the parts (Radar, Sensor, antenna, etc) aren't visible when looking through the spinning (transparent) prop arc. All the major parts of the aircraft are visible when looking though the arc (fuselage, wing, L/G Struts, etc), but just some of the other objects. Natually, I looked at the parts' properties in FSDS, but their all the same.
It's as though the prop arc is "erasing" portions of the parts.
Any suggestions would be appreciated...
v/r, Dave
Working on a UAV using FS Design Studio and am having a problem with a couple of aircraft parts. When I bring the model into MSFS-9 and pan my view, some of the parts (Radar, Sensor, antenna, etc) aren't visible when looking through the spinning (transparent) prop arc. All the major parts of the aircraft are visible when looking though the arc (fuselage, wing, L/G Struts, etc), but just some of the other objects. Natually, I looked at the parts' properties in FSDS, but their all the same.
It's as though the prop arc is "erasing" portions of the parts.
Any suggestions would be appreciated...
v/r, Dave