If so, try this setting -> http://forum.thinprint.com/cs/forums/p/177/352.aspx#352
Here are the specs of the computer in question.
Model: DX2000 MT
OS: Windows XP
CPU: Intel Celeron
Memory: 256 MB
Hard Drive: 40GB
Everytime it wants to print a .pdf document it comes up with a PCL X error.