when i burn the hex file its not working

when i burnt the example hex file the hardware is working.
but when the code i copied and compiled using keil uVision2 and converted to hex its not working what is the problem

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  • when i am connecting my leds to port1 they are very dimm...
    and actually i am going to built led cube......so for one led it's so dimmmer how would expect dark light with so many led's....
    and please explain me how i connect npn transistors in the led cube...
    and explain the circuit diagram of transistor with simple one led connection.....i am not able to understand the concept of transistor....

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  • when i am connecting my leds to port1 they are very dimm...
    and actually i am going to built led cube......so for one led it's so dimmmer how would expect dark light with so many led's....
    and please explain me how i connect npn transistors in the led cube...
    and explain the circuit diagram of transistor with simple one led connection.....i am not able to understand the concept of transistor....

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