Just tried again at Marketa and this is what I got.
Reason for Rejection
We were unable to process this order as trading on this security has been halted.
Market orders are not permitted for a stock that is halted.You can submit a Day order with a limit price for this security or wait until the halt is lifted and then submit your order.
My cash and margins are good. so congrats to you. I even called them yesterday to find out why and HALTED was their answer.