Why is my asain water monitor not active?

Hello everyone,

I've been doing years of study on large monitors, So I'm pretty good with adult monitors. However this is my first baby asain water monitor. Here's his stats:

Name: Pantoufle
Est DOB: Aug 28th 2008
Date of Adoption: Oct 17th 2008
Current enclosure size: 55 Gallon Long
(6' x 4' x 4' enclosure is in the process of being made)
Current length:
SVL: 7"
OL: 16 3/4"
weight: 84g

Enclosure Temps:
Basking: 120.0F
Hide box (located underneath the basking spot above a heating pad): 80.0F - I found out that the heating pad got turned off some how.
Cool: 71.0

Problem I'm having:
Isn't very active. Never comes out when I'm around. He refuses to eat infront of people. He will not eat mice(I offer him pinky mice).

Currently he's reciving fish (salmon & perch) and 50 crickets a day (if I put more crickets in he wont eat them) Everything is dusted with: Rep-Cal calcium with D3.

I've been holding him everyday for a few hours. One of my friends (who knows a little more about dealing with baby monitors than me) said to only hold him for 15 minutes.

Pantoufle doesn't bite, or threaten to bite if you try to pick him up slowly (like petting his back). He does toungue flick a lot when I'm in his cage or he's out and about (outside the cage).

Here's a current picture of his cage:
<table style="width:auto;"><tr><td><a href="http://picasaweb.google.com/lh/photo/NlrdK5ru1uwVoUBWDYtw2A?feat=embedwebsite"><img src="http://lh5.ggpht.com/_TrxATa0IHBs/STBgnKbIzUI/AAAAAAAADLQ/yP0r-qHvssI/s144/Pantoufles%20Cage%2008%20006.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="http://picasaweb.google.com/JadedNightDragon/Pantoufle?feat=embedwebsite">Pantoufle</a></td></tr></table>

All materials are made for reptiles (IE the log and fake plants) and others where sterilized. His current bedding is about 40lbs of soil and 50 lbs of sand. He has about 4" deep substrate. He use to dig, but doesn't anymore.

I water the soil down everyother week.

Am I doing something wrong?

I know his heating oad was off, but even when it was on he wasnt that active.

Sorry the orginal photos didnt take.

Is there a reason he is getting 50 crickets' worth of D3 dust per day?

He could be suffering from over-supplementation. D3 in large amounts is toxic.

Yeah, 50 dusted is a lot. I've got a little guy similar to yours and i just use goldfish to ensure he's getting his calcium and what have you. Just put them in a really tiny bowl thing with water and it'll get them whenever it's hungry. My guy seems to love it and is healthy. As for activity, maybe give him a reason to move about? I put my guys basking area on one side and his water to soak in on the other, and he's constantly going back and forth.