tmr2 interrupt problem

[mister_e]

TRY

        @ __CONFIG  _INTRC_OSC_NOCLKOUT & _MCLRE_ON  &  _LVP_OFF & _WDT_OFF & _PWRTE_ON  & _BODEN_ON  

        CMCON=7
        TRISA=0
        TRISB=0
        PORTA=0
        PORTB=0
      
        PIE1 =  %00000010
                '0------- Disable EE write complete interrupt
                '-0------ Disable comparator interrupt
                '--0----- Disable USART receive interrupt
                '---0---- Disable USART transmit interrupt
                '----x--- unimplemented
                '-----0-- Disable CCP1 interrupt
                '------1- Enable TMR2 to PR2 match interrupt
                '-------0 Disable TMR1 overflow interrupt
                
        T2CON = %00000010
                'X------- Unimplemented
                '-0000--- postscale 1:1
                '-----0-- Timer2 off
                '------10 prescaler 1:16
                
                        
        GIE     VAR INTCON.7
        PEIE    VAR INTCON.6
        TMR2IF  VAR PIR1.1
        TMR2ON  VAR T2CON.2
        RELOAD CON 131
        
        ON INTERRUPT GOTO ISR
        TMR2 = RELOAD
        PR2 = 0
        PEIE = 1    ' Enable peripheral interupt
        GIE = 1     ' enable Global interrupt
        TMR2ON = 1  ' TMR2 ON
        GOTO LOOP                

        disable
ISR:
        TOGGLE PORTB.0
        TMR2ON = 0
        TMR2 = RELOAD
        TMR2ON = 1
        TMR2IF = 0  ' Clear interrupt flag
        resume
        enable
        
LOOP:
        'TOGGLE PORTB.1
        GOTO LOOP

or another variant of

        @ __CONFIG  _INTRC_OSC_NOCLKOUT & _MCLRE_ON  &  _LVP_OFF & _WDT_OFF & _PWRTE_ON  & _BODEN_ON  

        CMCON=7
        TRISA=0
        TRISB=0
        PORTA=0
        PORTB=0
      
        PIE1 =  %00000010
                '0------- Disable EE write complete interrupt
                '-0------ Disable comparator interrupt
                '--0----- Disable USART receive interrupt
                '---0---- Disable USART transmit interrupt
                '----x--- unimplemented
                '-----0-- Disable CCP1 interrupt
                '------1- Enable TMR2 to PR2 match interrupt
                '-------0 Disable TMR1 overflow interrupt
                
        T2CON = %00000010
                'X------- Unimplemented
                '-0000--- postscale 1:1
                '-----0-- Timer2 off
                '------10 prescaler 1:16
                
                        
        GIE     VAR INTCON.7
        PEIE    VAR INTCON.6
        TMR2IF  VAR PIR1.1
        TMR2ON  VAR T2CON.2
        
        ON INTERRUPT GOTO ISR
        PR2 = 124   ' load period register for 2mSec 
        PEIE = 1    ' Enable peripheral interupt
        GIE = 1     ' enable Global interrupt
        TMR2ON = 1  ' TMR2 ON
        GOTO LOOP                

        disable
ISR:
        TOGGLE PORTB.0
        TMR2IF = 0  ' Clear interrupt flag
        resume
        enable
        
LOOP:
        'TOGGLE PORTB.1
        GOTO LOOP

The second one is probably the best method to deal with Timer2. have a look to section 6.0 of your datasheet.