Problem of postBack in sharepoint

while dealing with Response.End() I found that the postback events are disabled. I posted to MSDN Forum and thy responded on my post by the following:

Try to add this code to onClienClick event of the button to enable sharepoint post back event as the following

ButtonName.OnClientClick = "_spFormOnSubmitCalled = false;_spSuppressFormOnSubmitWrapper=true;";

my post on the following URL

Creating Custom properties in WebPart

For adding custom properties in webparts you can follow this article it is very useful.
http://msdn.microsoft.com/en-us/library/dd584174(office.11).aspx