Do you have a thermostat connected to the UTH that controls the heat put out by the UTH? If not, it is of the utmost importance that you order one (usually on-line). Rich, at Reptile Basics, carries an assortment of thermostats. For your viewing pleasure:
http://www.reptilebasics.com/Thermostats-p-1-c-250.html
Also, as others have mentioned, the instrument you use for measuring the warm and cool side temps is very important. Many people use Acu-Rite thermometers and/or an IR temp gun. The Acu-Rite will also measure ambient temps and humidity.
If the temp that you quoted was for the warm side, it is too low. Try to get the temp up to about 92F and the cool side about 82F with the ambient temps being about 82F. Humidity ought to be about 50-60% constant.
Since you just received your snake, it is always best to allow them time to feel secure in their new environment. This translates into not holding them for a week or so, or for a few days after you've given them their first meal. Some people even wait until after they have eaten a couple of times, ensuring a well acclimated snake.
It might be a great idea to post pictures of your enclosure if you think you'd like some help with it... But, again, a thermostat is a hugely important husbandry tool
