Datacolor User to User Support Group.

I'm creating QTR profiles for a few matte papers and I'm intermittently
having difficulty reading the paper base. I will either get a very high
reading (e.g. Premier Art Hot Press 205 - L 2.10, A 6.78, B -12.77) or the
correct L* reading for paper base but a very high A (e.g. Innova Smooth
Cotton Bright White - L 99.90, A 84.91, B 0.43). The correct reading for
SCBW is L 99.86, A0.6, B 0.33 and for PAHP it's L 98.72, A 0.99, B 0.28.

I've been working on this for the last 3 weeks on and off, and only lately
(last week or so) has the above occured. It's intermittent, but it seems to
be getting worse. I use a second sheet of the same paper type underneath.
Readings from my step wedge, other than 0%, are all fine. I re-calibrate
when I start a session. I have completely powered my PC down and back up. No
improvement. I am having the same problem with Innova Soft Texture Art and
Cold Press Art as well.

Suggestions?

Thanks,

Terry.