Lpc2000

I am having a problem making the internal Timer 1 match registers toggle the
corresponding package pin.

Am I right in assuming that in order to use the external match registers I
set T1EMR appropriately? 
For instance:
    T1EMR = 0x030;  
     // AND
    P0.12 = 0x10;

This should toggle the MAT1.0 output pin every time T1MR0 = T1TC or am I
missing some other linkage between T1MR0 and MAT1.0?  I am having the same
problem with the CAP1.0 pin.  I have an interrupt for the timer and it works
(toggles GPIO).  BTW All my package pins are set in one function.

Thanks