MC68hc908AZ60 can be programmed in circuit (without removing from the board)
1. Make connections as it's shown on the picture below. Maybe some connections are already done, so check the circuit. It's the best to cut the tracks which 68hc908 use for entering monitor mode (Especially IRQ, PAO and RESET). The voltage measured on IRQ have to be 8-9V.
2. Select correct baud rate. This can be automatically by pushing Auto Baud Rate button. If auto method is not successful (this is maybe the first indicating that something is wrong), the baud rate must be set manual in accordance with  the table below

Baud rate

Quartz Resonator

PCT3=0

PCT3=1

1MHz

1800

900

2MHz

3600

1800

4MHz

7200

3600

4.194MHz

7680

3840

4.9152MHz

8861

4430

8MHz

14400

7200

16MHz

28800

14400

For example: If PTC3 = 0, quartz = 8MHz, baud rate = 14400
if PTC3 = 1 (VDD), quartz = 8MHz, baud rate = 7200
A special baud rate must be set in mcu with mask:
8H62A mask with quartz 8Mhz, PTC3 = 5V - baud rate 7812
2J74Y mask with quartz 8 Mhz, PTC3 = 5V - baud rate 7246
1H56A at 7200 baud
0J66D at 7200 baud

3. Push Read button (with secure bytes - checked) . If reading is unsuccessful, you have to do power up reset (switch off power supply and wait until  Vdd<0.1V and Reset<0.1V) then switch on power supply, push Read button without checked Security Bytes check box. Always when  you have errors, you must to do power up reset