Action Events are not working in Webdynpro abap

Hi Experts,

I developed a webdynpro abap application  based on user input it will be in CREATE MODE or CHANGE MODE.It is working good for CREATE MODE but when we come to CHANGE MODE none of the action event is working.

If i do any action in that view  its hanging the application.I am unable to Trace the issues .

Please provided me Required information.

Waiting for Reply.

Thanks & Regards

Krishna.