I tried to short ADI before the hours at about 9AM. I used IB's Webtrader. I unchecked normal hours box and my order was accepted but my order was not showing as Ask price. I have shorted many stocks before the hours and AH but this time it did not work. I changed my order a couple of times. I reduced my price from ASK price, then matched the ASK price. The stock was traded over my ASK price but my order did not go through. I cancelled my order as I did not want to trade in regular hours. I would appreciate if someone from IB tells me what was wrong.