Insert with Parameters (SQL Server)

Hello, this is my code:

SqlCommand cmd =new SqlCommand("INSERT INTO Users (Username,Password) " +"VALUES ('@.username','@.password' ",new SqlConnection(my_ConnectionString)); cmd.Parameters.Add("@.username", SqlDbType.NVarChar, 50).Value = txtUsername.Text;cmd.Parameters.Add("@.password", SqlDbType.NVarChar, 50).Value = txtPassword.Text cmd.Connection.Open();cmd.ExecuteNonQuery();cmd.Connection.Close();

But in the database, the row inserted is exactly this:

"@.username" "@.password"

I mean, the parameters are not inserted :S

Please, tell me the error in the code...
Thank you so much,

Carlos.Placing single quotes around the parameters makes them be treated as literal strings. Remove the single quotes and you should have better luck.|||Thank you, now it works ;)

Carlos.