Lpc2000

I'm having some problems with the timer on a lpc2132 in the following
way: I'm developing a program which I'm running from RAM while
debugging. I've set up MEMMAP=2 to remap the interrupt vectors and it
does work .... sometimes. Here goes ..

I use Eclipse with the Zylin embedded plugin. When I want to debug I
download the program and starts execution. But the first time I end up
in the DApt_Handler no matter what. Then I download the program once
more (without powercycling the board) and this time it all runs
without problems (I'm watching a global counter). If I then try to
download once more, it sometimes work and sometimes don't.
I have the ADC running at the same time and it suffers the same
problems, but if I run without the timer and just the ADC it works
like a charm. If I run the Timer without the ADC I still get the problem.

I have the following code to setup my timer:
  // 15000 counts * 1/15 MHz = 1000 uS (1 kHz)	
  T0MR0 = 14999;	   					
  
  // Interrupt and Reset on MR0   
  T0MCR = 3;                            
  
  // Timer0 Enable                
  T0TCR = 1;                 
             
  // set interrupt vector    
  VICVectAddr1 = (unsigned long)tc0;    
  
  // use it for Timer 0 Interrupt 
  VICVectCntl1 = 0x20 | 4;      
          
  // Enable Timer0 Interrupt	
  VICIntEnable |= 0x00000010;

The interrupt handler looks like this:

	void tc0 (void) __attribute__ ((interrupt ("IRQ")));    
	
	void tc0 (void)
	{
		count++;
		
		// Clear interrupt flag
	 	T0IR = 1; 
		// Acknowledge interrupt      
		VICVectAddr = 0;                              
  	}

Has anyone encountered this problem, or is able to see whats causing
the problem? I'm drawing blanks ...

Best Regards
Søren