viewing float values in CCS5

Hi, I am working with a few functions from the math.h library but I am unable to see the results of the functions when i debug.  

The functions and variables compile and load, but in CCS while debugging I cannot see the variables in the variables tab and when i add them to the watch window they They appear to compile and load, but the variables that the type is unknown and the identifier is not found.  

What do i need to do to see the results of these functions. 

Here's the code. 

#include <msp430.h>
#include <math.h>

// *************************************************************************************************
// Prototypes section
void math_func(void);

int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer

math_func();
//float p = exp(0);
//float c = acos(0.5);

P1DIR |= 0x01; // Set P1.0 to output direction

for (;;)
{
volatile unsigned int i; // volatile to prevent optimization

P1OUT ^= 0x01; // Toggle P1.0 using exclusive-OR

i = 10000; // SW Delay
do i--;
while (i != 0);
}
}

#pragma CODE_SECTION(math_func, ".data")
void math_func(void)
{

float volt;

double p = exp(0);
double c = acos(0.5);
volt = (float) (512*0.0034799); // = 1.781733...
volt = volt * 1000;// => volt = 1781

}