Hi kfrazack,
Glad to hear you got it to work. One of the problems you may be having with your X10 devices hearing the SDM software is that the PowerLinc needs to be plugged into an outlet near your computer. Computers put quite a bit of noise on the powerline and interfers with the X10 and Insteon commands. What I had to do in my setup is purchase a FilterLinc from smarthome to filter my powerstrip with my computer on it.
One thing you could try to see if this is the problem is to plug your PowerLinc into an extension cord and run the extenstion cord to another outlet far away from your PC. See if that gives you any better success.
Wes