WSE call fails with error

Login example in the documentation works, however other API calls such as GetContacts or GetById fails. Sample code used is below:

// Documentation P595/596
var proxyLogin = new CPLogin.WSLogin();
// Token Generation
var loginToken = new UsernameToken("cpadmin", "cpadmin", PasswordOption.SendHashed);
loginToken.Id = "LOGIN";
// Add token to the proxy class
proxyLogin.RequestSoapContext.Security.Tokens.Add(loginToken);
proxyLogin.RequestSoapContext.Security.Elements.Add(new MessageSignature(loginToken));
// Invoke the SOAP request. The Login is set there...
CPLogin.WSUser loginUser = proxyLogin.Login("cpadmin"); // Returns the WSUser object for CPADMIN => Works
// Documentation p598
var mProxy = new CPProject.Project();
// Generate the Token
var textToken = new UsernameToken("cpadmin", "cpadmin", PasswordOption.SendPlainText);
// Add this token to the proxy class
mProxy.RequestSoapContext.Security.Tokens.Add(textToken);
var oRet = mProxy.GetById("{...}");


Error/warning messages:
13:56:31 Level5: Warning for error code:-2003 Login user password is not provided by AccessToken.
13:56:31 Level2: Error: Number= -2001 Message= Login token is not valid, please login. Can not find login user ID.
13:56:31 Level1: Log for this source is end.


Reason:
The error message in the ws log file shows that the login token is not valid, due to the incorrect usage of UsernameToken() method.

Resolution:
Before accessing any of the other Changepoint Web Services API methods, custom application must first login to the Web Services API interface and generate a security token, which will be used for accessing other WS API methods. The correct usage of the UsernameToken() method is below:

CPLogin.WSUser loginUser = proxyLogin.Login("cpadmin");
var mProxy = new CPProject.Project();
var textToken = new UsernameToken(loginUser.value.UserId, loginUser.value.AccessToken, PasswordOption.SendPlainText);
mProxy.RequestSoapContext.Security.Tokens.Add(textToken);
var oRet = mProxy.GetById("{...}");