xp sp3 iis5.1 .net framework4.0 无法浏览aspx网页
rt
vs2010开发完成的aspx页面，放入网站目录，无法浏览。

Server Application Unavailable 
The web application you are attempting to access on this web server is currently unavailable. Please hit the "Refresh" button in your web browser to retry your request. 

Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur. 

求解...

------解决方案--------------------
IIS设置里面有aspx么