Firmware update
One of the first things to do, is to check that you have the latest Firmware. If not, you should update it. There are a lot of software glitches in this product and some of them might have been fixed.
If you are the lucky owner of a DP-558 you also have the option to install the much improved hack, called "Stage2" By Martinb.
AFAIC that's the best asnewr so far!