"Checking update...." run forever if internet connection was offf

Hi there,Currently, I use wyUpdate WPF for 500+ machine. Some of them complain that the app doesn't update, it's just stuck at "Checking update..." status. After few days, I found that their internet is intermittently and wyUpdate doesn't thrown any error, it's just stuck.For reproduce this, you can create new WPF app and add wyUpdate...after all of steps just turn off internet or just change the update site to incorrect one .ie: the right update site is http://mysite/httpdocs/updates/ and you change it tohttp://mysite/httpdocs/updates1/ you can notice that "Checking update...." will stuck forever instead of error that site not found or something.Please help me.