i am using keil c51 with default setting.

Atmel 89c52

I wrote one test prog. for timer0 intrrupt
to get 1 ms time intrrupt. whenever i make a target file with inrrupt function keil jumps at address location where there is no main prog. from 0x0000 address to 0xb000.
Intrrupt function takes his proper IVT address 0x000b for 1st.

with out intrrupt function there is no problem. please guide me how to control main and function prog. starting addresses in keil c51.