Lpc2000

I have set the UART interrupt up to run from RAM so I can use it 
during IAP writing to FLASH yet it causes the same problem as if I 
were running the interrupt from FLASH.
Does any one have any experience this?

The interrupt vector in startup.s is:

   LDR     PC, [PC, #-0x0FF0]     /* Vector from VicVectAddr */

 And the vector address for my UART1 interrupt is my RAM function:  

  VICVectAddr2 =  (unsigned long)u1intRAM;


This works fine by itself, but not when I try to use IAP with the 
UART interrupt anabled and all the rest disabled.

Could it still be getting something from FLASH?