About manual setiings in nokia x2

Hello,

Hello,i have nokia x2 and I am using tata docomo sim.i got manual gprs setting of tata docomo after that internet started in my mobile,but the problem is that only pre-loaded web browser opera is runing in my mobile.when I open the web it does not open and one massage shows check home page adress.one more problem is that, I have downloaded 4.2 version opera mini from pre-loaded opera but it also does open and one massage shows failed to connect contect your servies provider. Kindly give me suggetion that what should I do ?