Serial interupt (SOLVED)

Using Arduino Networking, Protocols, and Devices
6

I need this interrupt because in the same time I have several timers, and I want to manage special priorities order.
I have found the solution:

#include <plib.h> /* this gives the i/o definitions */

boolean received;

void setup()
{
received=false;
Serial.begin(38400);
}

void loop()
{
if (received)
{
Serial.println("RECEIVED!!!");
received=false;
}
}

extern "C" {
void __ISR(_UART_1_VECTOR, ipl4) U1_ISR(void)
{
if(mU1RXGetIntFlag())
{
// Clear the RX interrupt Flag
mU1RXClearIntFlag();

// Handle Character
received=true;
}
}
}
and now I can choose the IPL I want!

Thanks