关于webservice连接数据库的问题
我在webservice中连接mysql一直连不上 就大神帮帮小弟 下面是异常和代码

异常：System.Data.SqlClient.SqlException: 用户 'xingfukun' 登录失败。
  在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
  在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
  在 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
  在 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
  在 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)
  在 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject, Boolean withFailover)
  在 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
  在 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
  在 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, SqlConnection owningObject, Boolean redirectedUserInstance)
  在 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
  在 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options, DbConnectionPoolKey poolKey)
  在 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
  在 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
  在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionInternal& connection)
  在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionInternal& connection)
  在 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionInternal& connection)
  在 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry)
  在 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
  在 System.Data.SqlClient.SqlConnection.Open()
  在 WebApplication2.WebService1.GetUserInfo() 位置 e:\C#\WebApplication2\WebApplication2\WebService1.asmx.cs:行号 35


代码：
  [WebMethod]
  public DataSet GetUserInfo()
  {
  //连接SQL数据库
  System.Data.SqlClient.SqlConnection SqlCnn = new System.Data.SqlC