I have a 3rd party calendar control (day pilot pro) and a label on my form.

i want my label to show the week number when a user clicks on any date on the calendar. My week number calculating method is working fine but my label does not update automatically. when I debug,I can see that my label.text has the right value, but it does not reflect on the page.

any good idea?? or label is not a suitable control for this purpose??

I have attached a text file in which you find the code----