I am from Pakistan. I am trying create student account but couldn't do that. One error came again and again i.e."The password/ID combination you have entered is incorrect. Please re-check your information and try again.". Please somebody help me to create student account. I will be grateful to you my whole life.

I think you can only use it if your university subscribes to it. If it doesn't recognise your address then it probably doesn't. Can you check with your university?

There's nothing you can do then, it's a not a free service, if your university doesn't pay for it then you will have to if you want to use it.