How to bring back to my application Main menu?

I developed one phone application that runs on S60 2nd and S60 3rd devices. When I go to call log and pick up one phone number to call; my application runing in the background. when the call was set up, it always bring call log menu to the front. I want to bring my application menu to the front.
I hope someone can help me to solve my issue.

I mis read the post totally, anyway did you tried
[url]http://wiki.forum.nokia.com/index.php/Sending_an_application_to_background[/url].

Some similar discussion as well:
[url]http://discussion.forum.nokia.com/forum/showthread.php?t=46597[/url]