CCS/TMS570LC4357: Problem in GIO interrupt 0 bit for port A

Part Number:TMS570LC4357

Tool/software: Code Composer Studio

Hi,

For the GIO interrupt i tried the following code:

_enable_IRQ();
gioInit();
gioEnableNotification(gioPORTA,0);

gioSetDirection(gioPORTA,0x01);
gioSetBit(gioPORTA,0,1);

but when same i tried with the bit 7 instead bit 0 it worked.

why is it so?

What if i want to use the same bit in my application?

Please help me in the case.

Regards,

Shivam Kakad