Acrobat Plug-in getting triggered automatically

Hi
I am new to this site and have no idea where to post this question. I will really appreciate if someone can help me solve this problem.

I am developing an acrobat plug-in for Acrobat professional 9 which will export all annotations in original document into an xfdf document.The plug-in must get triggered on saving the original document after creation of annotation.For this I captured before save event(PDDocWillSave),the code works fine and creates the xfdf. The problem is that sometimes the plug-in gets triggered on opening a pdf document or xfdf document and also on creation of annotation. I am unable to detect the problem so far.

Thanks in advance.