title: Connecting to the device via zkemkeeper.dll WITH PASSWORD in C# .net
body: <p>I have to implement a biometric system. Im using ZKTeco LP600 time attendance device and ZKTeco SDK (ZKemKeeper.dll) here its the situation:</p>
  
  <p>When I try to connect to device with no security password(the one who configure in the device > menu > communication > security > 6 digit Password ) I achieve it without any trouble. </p>
  
  <p>But when I put some password things go wrong...I recive the error -6</p>
  
  <p>Im using: bool isConn= axCZKEM1.Connect_Net(devIP,4370);</p>