Prefetch Abort Exception

I am an ARM based System developer and wrote the startup for LPC2368 using GNU compiler directives.Till the linking stage all goes well however when i single step through the program then during the execution of the first line that is the place where reset address is defined that is 0x00000000 i get a prefetch abort then when i again single step i get a prefetch abort at 0x0000000C.
I have made the corresponding memory size changes then why am i getting this error,Please do reply as earliest as possible...

Thanks and Regards
Jomcy Pappachen

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