Using SafeXcel-810's Xcarddetect pin to unsuspend

I am trying to use the (A)carddetect pin
on a SafeXcel-810 device to unsuspend my
device. I'd rather not use the GPIO ports.
(to long to explain) Changing states on
this pin (high to low or low to high) DOES
unsuspend the device but if I toggle this
pin faster than ~1 seconds sometimes the
SafeXcel-810 misses the change. I need the
ability to unsuspend very quickly and
reliably.

I've tried handling the interrupt using:
// See if the card detect has changed.
if (INTSTATUS1 & INT1MASK) {
INTSTATUS1 = INT1MASK;
}

The above is getting hit but does not
decrease the responce time.

I am not using any smart cards. I just want
to use this pin to unsuspend.

Thanks in advance for any comments...

Randy