I also tried to blink the onboard RGB Leds but none of the Leds light up. If I flash some other example projects written in Keil, they work and so the hardware setup is fine.
I forgot to mention that with the latest post (post #3) I am trying to blink 4x LEDs connected to lower 4 bits of PORTE that is PE0,1,2,3. I also have 4x tact switches wired to PB0,1,2,3.