It's not uncommon for a BP to stay in one hide or another for extended periods of time, how ever if you're worried about it, or you notice one side is never getting used. It can be a good idea to double check your temps. Make sure you are using a digital thermometer or heat gun. The temp stickers they sell at petco are great for finding the temp of the wall of the cage. The problem with this is that bp's are are warmed via belly heat (There's a term for this but I've forgotten what it is.). That means that the temp stickers are not accurate when judging how warm or cold your new BP is. I'd suggest (if you can) that you post a picture of your tank. That would make it lots easier for us all to nitpick it to death. Ha Ha.
I would also suggest you take some time to read the Care Sheet on this forum. It gives some excellent advice and is a must read for any new BP owner.
Also a red heat bulb works well for keeping the ambient temps up in a cage, how ever it will also cause problems with humidity, I would suggest looking into a small or medium UTH and a dimmer switch or thermostat.
Just some suggestions. I'm sure others will follow.