Hi Bob,
Yeah! I'm a Texan! Cool!
I'd almost
bet that your dishwasher drain line is NOT clogged but simply installed incorrectly. If I'm right, some water from the sink will drain (siphon) back to your dishwasher making you believe that it's not draining properly. (BTW, I've had a thousand service calls run for just this problem, so I know of what I speak)
Look under your sink and take a gander at your dishwasher drain line... if it looks like this, it ain't right.
This allows sink/disposal water to siphon off to your DW. All you gotta do is loosen the clamp (in the pic), remove the drain line, pull as much slack as you can (without pulling to hard... like it'll break if you do that) and put a loop in it like this...
OK... after you get your loop, you'll need to tighten your hose clamp. As an extra measure of security (to keep the loop in place), secure the drain hose to your sinks water supply line.
There ya go! 15 minutes, no parts, no head-aches and you're done! Cool, huh? All you gotta do now is kick back and wait for the Cowboys pre-season! (BTW... if your drain is installed properly, write back and we'll go a little deeper into a diagnosis, OK?)
SG