1. Bad Accengage's SDK Integration
Most of the time, it's about integration problem of our SDK. Try to remove it from your project, and reintegrate it in the most recent version if possible.
2. Verify settings of your in Accengage's interface
Go in the Settings of you application on our interface.
Verify correspondence between the templates you use in your application and those that are configured in the interface. Check especially the good spelling of different elements in Categories or Custom Params...