"INSUFFICIENT BTC @ ADDRESS" when there is enough in balance

Getting very frustrated with counterparty lately… I am trying to send SJCX but continually get the response "INSUFFICIENT BTC @ ADDRESS " (Need approximately 0.00128307 BTC.) and my balance shows that I have .00191btc in the wallet. I am wary of sending more btc address to this shitty CP system that hasn’t seen any noticeable major updates in years. Why won’t it send???

thanks in advance.