P1130 -- Low Contrast when Calibrating with OptiCAL / Spyder

I have a Dell P1130 FD Trinitron monitor, with my Dimension 8300 system. This system is incredible, with one exception ... When I attempt to calibrate the monitor (to facilitate photo / image editing) I cannot achieve the required contrast setting. The Pantone / ColorVision program says to adjust the monitor's contrast to a value of 90 cd / m2 ... the maximum that I can get from the monitor (at 100 % contrast setting) is 64.5 cd / m2.  A check of the Black point is good, but a check of the white point shows the same problem -- 64.5 cd / m2 is the most I can achieve from the monitor. The brightness and colour temperature calibrations work fine -- it's just the contrast that seems to be low. I am operating the monitor at what I think are the optimal / recommended settings: 1280 X 1024 @ 85 HZ. refresh rate.

When I unpacked the new system I noticed several small "rubbed" spots on the plastic enclosure of the monitor (which didn't appear to coincide with any placement of the packing materials). I didn't think much of it at the time ... but now I'm beginning to wonder -- is it possible that Dell inadvertantly shipped a refurbished P1130 with my (otherwise) new system?

Any comments / recommendations are greatly appreciated.