I have bought few EARS shares in Jan (300) and May(500). I am still learning stock market basics. But now, I can not sell 500 shares in profit. Whenever I tried to make trade on Fidelity; I am constantly getting message " Due to an existing, conflicting order for EARS (AURIS MEDICAL HOLDING AG CHF0.40 ), you do not have enough shares available to complete this order. Please review your open orders and make any necessary changes." I am not getting what I did wrong or missing here?