Have you ever watched Supernanny? Have you taken any classes, watched any videos, or read any books, like 1-2-3 Magic, about child discipline? How much do you know about child development?
Your son is in pain and he is using what works. Too often as parents we don't fully understand what is going on inside a little ones head and we assume they think like we do. They don't. It is so important to understand that our children have limited capability to express what they need and will resort to whatever works for them to recieve what they need. Too often this means resorting to "bad" behavior because that is often the only way they are heard.
Often, a parents own emotional state, inner wounding, and lack of information contribute greatly to whether any form of discipline will work. Good, loving discipline requires us as parents to take responsibility for our own emotional issues, to be extremely consistent, and to be willing to be disliked and to allow our children to experience negative emotions like disappointment and frustration.
You will need to choose a form of discipline and stick with it ruthlessly. If you have ever had the chance or can find a way to see a few episodes of Supernanny you will be able to see what it sometimes takes to turn the tide on a situation that seems out of control. It takes a great deal of dedication to shift things when they have gotten to the place you are experiencing.
Talking to your son won't work especially when he is upset.
Pick a time-out space and be extremely consistent even if it takes two hours.You have to use a discipline technique over and over and over for an extended period of time for it to work. You can't just try once or twice and give up because it doesn't seem to be working.
Deal with your own emotional charge separately from your discipline. If you find yourself too angry or upset then take a mommy time-out and go in a seperate room and feel your feelings and be gentle with yourself.
Get some help. Hire a parenting coach or nanny that specializes in supporting parents in overcoming these types of issues.
Read as much as you can about different discipline techniques, child development, etc.
Take a parenting class or two or three.
Talk with someone about your own issues that may be effecting your ability to show up fully for your son.
Resource yourself. Being a parent is a tough job and we need all the support we can get. Too often we buy in to the idea that we are supposed to just know what to do and then are supposed to do it all on our own. That is a bunch of bs. We need support, we need a break, we need understanding, we need down-time, we need to be heard, we need to heal our own woundings, we need to educate ourselves, we need TLC, we need to be honest with ourselves about our weaknesses and get support where we can.