刚刚想传几张照片，结果。。。失败，如下，有没有高手帮忙解释下？
Server Error in '/' Application.
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Maximum request length exceeded.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Maximum request length exceeded.
Source Error:
[No relevant source lines]
Source File: c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\0d32c94a\aa1aa2e9\App_Web_62uro42w.22.cs Line: 0
Stack Trace:
[HttpException (0x80004005): Maximum request length exceeded.]
System.Web.HttpRequest.GetEntireRawContent() +8763266
System.Web.HttpRequest.GetMultipartContent() +62
System.Web.HttpRequest.FillInFormCollection() +168
System.Web.HttpRequest.get_Form() +68
Discuz.Common.DNTRequest.GetFormString(String strName) in E:\My Documents\Visual Studio 2008\Projects\dnt2_n2_src\Source Code\Discuz.Common\DNTRequest.cs:197
Discuz.Common.DNTRequest.GetString(String strName) in E:\My Documents\Visual Studio 2008\Projects\dnt2_n2_src\Source Code\Discuz.Common\DNTRequest.cs:213
Discuz.Web.UI.Pages.BasePage..ctor() in E:\My Documents\Visual Studio 2008\Projects\dnt2_n2_src\Source Code\Discuz.Web.UI\Pages\BasePage.cs:498
Discuz.ForumPage.posttopic..ctor() in E:\My Documents\Visual Studio 2008\Projects\dnt2_n2_src\Source Code\Discuz.Web\aspx\1\posttopic.aspx.cs:143
ASP.aspx_1_posttopic_aspx..ctor() in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\0d32c94a\aa1aa2e9\App_Web_62uro42w.22.cs:0
__ASP.FastObjectFactory_app_web_62uro42w.Create_ASP_aspx_1_posttopic_aspx() in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\0d32c94a\aa1aa2e9\App_Web_62uro42w.23.cs:0
System.Web.Compilation.BuildResultCompiledType.CreateInstance() +32
System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp, Boolean noAssert) +119
System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +33
System.Web.UI.PageHandlerFactory.System.Web.IHttpHandlerFactory2.GetHandler(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +40
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +160
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
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Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
