if you are using new converted "secured" ibPro-Games, they will not work with v3arcade - those games do only work with ibProArcade v2.6.0+ and later
v3arcade is only compatible to the old ibPro-Games, which are unsecure and where cheating is possible in an easy way (same method as v3arcade-games btw) while only the new v3.2 and v3.3 ibPro-Games use Score-Encryption and other techniques to prevent this...