ASP.NET appilcation hanging due to double post back

Hi,

In our application (web application in ASP.NET/VB.NET with SQL Server database), we have a situation where it is hanging due to double post back. In other words, if I have a check box on a screen and when the user clicks on the check box, there is a post back event happening. While that is happening, all the controls on the screen are still active and if the user happens to click on some other control, then due to this 'double post back' the application is hanging and the only option for us is to close the application.

Are there any ways to avoid this problem?

Thanks in advance
oursmp