PasswordAuthenticationMethod stopped working

my code stopped working from 15 april.
Im a software tester that can write code. Not a dotnet expert. Can some one help me out?

im using version 2016.0.0 now trying 2016.1.0

 public LinuxRunner(string clientHost, string sshUsername, string sshPassword)
        {
            this.sshPassword = sshPassword;
            ConnNfo = new ConnectionInfo(clientHost, 22, sshUsername,
            new AuthenticationMethod[]{
                // Pasword based Authentication
                new PasswordAuthenticationMethod(sshUsername,sshPassword)
             });
            
        }

Renci.SshNet.Common.SshAuthenticationException: Permission denied (password).
   at Renci.SshNet.ClientAuthentication.Authenticate(IConnectionInfoInternal connectionInfo, ISession session)
   at Renci.SshNet.ConnectionInfo.Authenticate(ISession session, IServiceFactory serviceFactory)
   at Renci.SshNet.Session.Connect()
   at Renci.SshNet.BaseClient.Connect()
   at StepTester.LinuxRunner.UploadScripts() in C:\projects\testen\stepSystemTest\StepTester\LinuxRunner.cs:line 38
   at StepTester.Program.<>c__DisplayClass0_0.<Main>b__0() in C:\projects\testen\stepSystemTest\StepTester\Program.cs:line 148

Start at StepTester/LinuxRunner.cs line 38, where Connect is reached, and review the PasswordAuthenticationMethod setup in the issue alongside the version change from 2016.0.0 to 2016.1.0. Compare behavior between those versions and use the reported SshAuthenticationException to determine whether the regression is in SSH.NET or the connection credentials; done requires a reproducible cause and confirmed fix.