Not getting mouse click event on marker with custom icon

Hi,

I have been trying this for last 3-4 hours, but with no success. I
want to invoke the mouse click event on a marker, which has a custom
image; but due to some strange reasons it is not working.

You can browse through my application at location

http://121.242.77.142/markeroperations/Default.aspx

Any help is greatly appreciated.

Thanks in advance.

Hari