did you sign a contract with your broker, sometimes you need to do that for trading otcbb and pinksheets, contact your broker. If your broker does not do otcbb and pink, you can better go to another broker. gltu
With E-Trade, the only time that I get rejected on a limit sell order is when I put in a figure that's way over the current price. For instance, if I put a GTC order it at $1 for CXAC.