An unhandled exception of type 'system.data.sqlclient.sqlexception' occurred in system.data.dll

string connectionString = null;
            string sql = null;
            connectionString = "Server=(localdb)\v11.0;Integrated Security=true;";
            using(SqlConnection cnn = new SqlConnection(connectionString))
            {
                sql = "insert into EmailParser ([Sender]) values(@sender)";
                cnn.Open();
            using(SqlCommand cmd = new SqlCommand(sql, cnn))
            {
                cmd.Parameters.Add("@sender", SqlDbType.NVarChar, 50).Value = email.From;
                cmd.ExecuteNonQuery();
            }

Data Source=(LocalDB)\v11.0;AttachDbFilename="\\blah\USERS\blah\blah\My Documents\visual studio 2012\Projects\EmailParser\EmailParser\EmailParser.mdf";Integrated Security=True