hi sir, i hav been trying one code since yesterday, but the code is not entering to main().PC is sticking at 'BX R0',part of start up file.
the PC is not going furthre from the : 0x08001530 BEAD BKPT 0xAB of disassembly window.
Considering that you have installed MDK 5, take a look at:
"Application Builds Without Error, But Does Not Run"
http://www.keil.com/support/docs/3614.htm