Temperature sensor using c8051f930

I have the temperature sensor program running at 24.5Mhz
I am trying to execute it at 30khz.
I already changed the Oscillation to 30khz.
CLKSEL = 0x03; // Select precision internal osc.
// divided by 1 as the clock
but it stopped working.
code- #-Link-Snipped-#

My boss wants me to finish this ASAP. Please reply fast.!