I cannot get the Harrier to lift-off in VTO configuration. At full throttle (confirmed on engine MFCD page), the weight comes off of the landing gear but it never comes off the ground. I have tried it clean and with armaments. Flaps in STOL mode at confirmed down. I have tried nozzle settings between 80-90 degrees, water injection off, TO, & landing mode...nothing. What am I missing.