parameter sliders not visible in camera view?

ok this is the first time ive tried to use parameter wired sliders to control a camera rig in max.

all working fine, apart from when i change to the camera view, sliders disappear. this is obviously a right PITA.

according to the help files they should be visible in whichever viewport is active.

max 2011… any suggestions?

Might be related to clipping distances…

Best regards,
Vlado