Teach trade is a broker who as i understand it was an IB for PMB -but now that PMB has been bought by Refco - its seems that Refco has lost interest in retail customers and so are not supporting the ex PMB IBs
Teachtrade is run by a big cheese at the CME who probably has the power to kick shit - so he may have pulled himself out of all the crap - and is now servicing his clients another way