The PIC does not start its program.

[Ted's]

I assembled my new pic 16f628a circuitry. The PIC does not start its program.

My checklist:

Voltage: +5V Pin 14, Mass Pin 5 OK
Osc 20Mhz quarz: Pin 15 and Pin 16 OK - I only have a multimeter, so what I found is that values change between 0 and +5V, I assume a sine wave.
Program: PIC is being programmed well according to software. As usual.

PIC Program

@ DEVICE MCLR_OFF
@ DEVICE hs_osc
@ DEVICE wdt_off
@ DEVICE lvp_off
@ DEVICE protect_off

Define OSC 20
INTCON = 0
CMCON = 7
TRISB = %00100100
TRISA = %11111100

LED_Kalib VAR PORTB.7
LED_Halb VAR PORTB.4
LED_Voll VAR PORTB.6
LED_Besch VAR PORTA.0
LED_OK VAR PORTB.0

Low LED_Kalib
Low LED_Halb
Low LED_Voll
Low LED_Besch
Low LED_OK
High LED_Kalib
High LED_Halb
High LED_Voll
High LED_Besch
High LED_OK
Pause 500
Low LED_Kalib
Low LED_Halb
Low LED_Voll
Low LED_Besch
Low LED_OK

Anything missing in the checklist? Any ideas on how to solve the issue?