changing the starting address

i need to change the starting location of my pgm frm 00h to say,400h..i followed the steps as per mentioned in.... http://www.keil.com/support/docs/189.htm
i can see the changed starting location in the memory map file...but when i try to implemnt it on hardware,i get no output probably bcos da execution begins at 00h only...pls help...

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