always go to interrupt

[savnik]

i have a problem with below code.
always go to interrupt.Why;
i use pic16f88
i have pull-ups resistors to rb4-rb7

    
    INTCON = %10001000          ' %10001000  enable interrupts on RB4 through RB7

    SW1 var PORTB.4
    SW2 var PORTB.5
    SW3 var PORTB.6
    SW4 var PORTB.7

    LED1 var PORTA.0
    LED2 var PORTA.1
    
    On Interrupt goto inter    ' Define interrupt handler
    
    TRISA=%11110000         'PA3-PA0=output
    TRISB=%11110000         'PB7-PB4=input, PB3-PB0=output
    PORTA=0                 'Turn off all LEDs
    
Loop: 
    High PORTA.0
    Pause 500
    Low PORTA.0
    Pause 500    
    goto Loop

     Disable                ' No interrupts past this point     
inter:

'*** Blinking routine ***

    High PORTA.0
    Pause 500
    Low PORTA.0
    Pause 500
    High PORTA.1
    Pause 500
    Low PORTA.1
    Pause 500
    
    INTCON.0=0       ' Clear interrupt flag
    Resume           ' Return to main program   
    Enable  
    
    End