Cisco Firewall :: ASA 5520 / SSM-20 Password Recovery With 5.0 Image Running

The customer forgot the password for the ASA SSM-20 ips module installed in ASA 5520 Fw.show module in customer FW shows it up state. I brought it to our office teat bed. here it show

ASA1# sh module
 Mod Card Type                                    Model              Serial No.
--- -------------------------------------------- ------------------ -----------
  0 ASA 5520 Adaptive Security Appliance         ASA5520-K8         JMX1022K03A
  1 ASA 5500 Series Security Services Module-20  ASA-SSM-20         JAB101003C2
 Mod MAC Address Range                 Hw Version   Fw Version   Sw Version    

[code]....*-

what to do with  this module in my test bed.I have to take it back to the customer site to use it in their ASA itself to troubleshoot.There it the status is up and i did use all the hw-module option but no use. The version is 5.0. This module is more than 5 years old and so far no one upgrade the image. ASA 5520 running 8.2.5.