can't generate FormProperties in BPMN file

[ilyass_act]

hi , i'm using java to create my Model :

public static StartEvent createStartEvent(List<org.activiti.bpmn.model.FormProperty> formProperties){
StartEvent startEvent = new StartEvent();
startEvent.setId("start");
startEvent.setFormKey("page.xhtml");
startEvent.setFormProperties(formProperties);
return startEvent;
}

when i generate the file i can't find my FormProperties . the problem i think is the tag ExtensionElement , but i can't find it : 

ExtensionElements cannot be resolved to a type

[jearles]

Ilyasse,

Can you give us a little bit more context around the problem - log files, the generated file, anything helps.

-JEarles

[ilyass_act]

i found the problem it's just the file wont update when i delete it i find my BPmN file as it should be thanks . do you have any good resources or example on how to pass parameters between JSF and activiti