ok,
There are a couple of modifications that need to be made to your enclosure.
1.) Remove the heat rock
2.) Place the UTH under the hide
It kind of looks like you're trying to produce a basking area on the right side of your tank? Snakes don't bask so this is unnecessary.
The heat lamp looks like its on the side of the tank. Try moving it to the middle of the top to provide an ambient heat to the entire tank.
It looks like you have condensation inside the tank, which means your humidity is much higher than it needs to be, which is in the 50% to 60% range.
Honestly a lot of this stuff is covered in the care sheets and stickies in the husbandry forums, you might want to take another look.
Again, this is information from bcr229's links but...
How are you controlling your heat sources? How are you measuring your temperatures? What are they?