网站好好的突然不能访问了

iZiu2dxov7jwfeZ 3636 w3wp.exe IIS APPPOOL\fqcszh.com HttpCompileException d:\index.aspx(14): error CS0433: 类型“ASP.ascx_header_ascx”同时存在于“c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\cb5e80a2\15ed1b9b\App_Web_vflw4xfk.dll”和“c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\cb5e80a2\15ed1b9b\App_Web_tvazd7ru.dll”中 index.aspx /index.aspx