C# timer problem

Question

When i Enable The timer while running program? my program will not doing anything else and stop of doing any click i do like exit the program or anything else i am just having this problem in this timer i have another 2 timer when i enable them there is no problem and it is my code on that timer when enable it:

              private void timer1_Tick(object sender, EventArgs e)
        {


                bool check = login.remain_AttemptsTime();

                if (check)
                {
                    login.reset_afterRestricted();

                    timer1.Enabled = false;
                    textBox1.Enabled = true;
                    textBox2.Enabled = true;
                    button1.Enabled = true;
                }
                else
                {

                    timer1.Enabled = true;
                    textBox1.Enabled = false;
                    textBox2.Enabled = false;
                    button1.Enabled = false;

                }

        }