repeating of udf form on ncount

Hi,

I have developed one UDF screen with SAP default buttons. I catched the following event filters

form laod, form activate, item pressed , menu click, key down and click event. when I opened my screen it worked fine for the first time. When I open the screen second tinme, the events are firing twice. when I opend for the 3rd time it events are firing thrice and so on.

How to control these events. How to stop multiple repeating of events.

Even I made all objects to nothing before closing the form during cancel button. How to control this ?

Thanks in Advance!

Madhu