服务器在IIS6上使用asp.net 3.5返回空白页面

I have a problem with site deployed on IIS6 sever. Here the problem, when I first deploy asp.net 3.5 site to server (site is relatively small with 5 pages and 5 libraries in bin), it is works as expected. But after some period of time (~1h) server returns black pages instead of expected content:I have a problem with site deployed on IIS6 sev