Roach,
I have been running a BakPak in each of my 30 gallon tanks without problems.
Is the BakPak new or used? The real question is: is the powerhead new or used? What brand is it? -a Rio 600, Rio 800, Maxijet 900 or maybe a Maxijet 1200?
My first suggestion is to check out the powerhead. Does it work not connected to the skimmer? Either way, take the impeller apart from the rest of the powerhead, soak it all in some vinegar for a good 20 minutes. Scrub it with an old toothbrush and give it a good rinse. You may want to use RO water for the rinse. I usually use tap water. Reassemble the powerhead and attach to the skimmer.
If that doesn't work, get a new powerhead.
My second suggestion is to check the water intake to ensure there is no blockage to the skimmer. Maybe a snail crawled up there (and died). I have has snails crawl up into the BakPak water outlet and moved throught the skimmer. (As part of my daily check of my tanks, I check the skimmer.) I fished them out, so I never had one actually get to the intake area. Maybe that is what happened to you.
My last suggestion is a repeat of Rich-n-poor. If you have not done so already, get rid of the biobale. If you have LR in your tank, you do not need the biobale.
HTH