Cambridge Model 20 to OLC

What do I need to do the get a valid IGC file posted to OLC? I am using
the utilities to convert the downloaded "cai" file to "igc". Doing so
the security checks are good. When posting to OLC, OLC checks the file
assuming it came from a Cambridge 302 (I am using a Model 20) and fails
the security check. Can someone tell me if they have been able to get a
model 20 posting to OLC. Thanks!

Output of validation

123
FreeDOS kernel version 1.1.28 (Build 2028) [Dec 09 2002 21:55:55]
- InitDisk
C: HD1 Pri:1 CHS= 0-1-1 start = 0MB,size = 392
D:643.TMPvalicam2 66ac0tt1.igc out.txt
ValiCam for the 302 Version 1.0.0
Checking File:66ac0tt1.igc ...
Log Data Integrity Fail
Signature Data Integrity Fail
Security Fail
D:643.TMPvali-cam 66ac0tt1.igc out.txt
Cambridge Aero Instruments Flight Log Validation ---- v1.04
-------------------------------------------------------------------------------
File 66AC0TT1.IGC is not a valid CAI log file
-------------------------------------------------------------------------------
D:643.TMPigc2cai 66ac0tt1.igc out.cai
D:643.TMPvali-cam out.cai out.txt
Cambridge Aero Instruments Flight Log Validation ---- v1.04
-------------------------------------------------------------------------------
File OUT.CAI is not a valid CAI log file
-------------------------------------------------------------------------------
D:643.TMPconv-cam -n66ac0tt1.igc out.cai org
CONV-CAM Version 2.0.2 IGC File Creation
Path for CAI files:
Path for IGC files: org
OUT.CAI is not a valid CAI file.
D:643.TMPecho '' out.txt