Server Error in '/' Application.
Server   Error   in   '/ '   Application.
--------------------------------------------

Runtime   Error  
Description:   An   application   error   occurred   on   the   server.   The   current   custom   error   settings   for   this   application   prevent   the   details   of   the   application   error   from   being   viewed   remotely   (for   security   reasons).   It   could,   however,   be   viewed   by   browsers   running   on   the   local   server   machine.  

Details:   To   enable   the   details   of   this   specific   error   message   to   be   viewable   on   remote   machines,   please   create   a   <customErrors>   tag   within   a   "web.config "   configuration   file   located   in   the   root   directory   of   the   current   web   application.   This   <customErrors>   tag   should   then   have   its   "mode "   attribute   set   to   "Off ".


<!--   Web.Config   Configuration   File   -->

<configuration>
        <system.web>
                <customErrors   mode= "Off "/>
        </system.web>
</configuration>
 

Notes:   The   current   error   page   you   are   seeing   can   be   replaced   by   a   custom   error   page   by   modifying   the   "defaultRedirect "   attribute   of   the   application 's   <customErrors>   configuration   tag   to   point   to   a   custom   error   page   URL.


<!--   Web.Config   Configuration   File   -->

<configuration>
        <system.web>
                <customErrors   mode= "RemoteOnly "   defaultRedirect= "mycustompage.htm "/>
        </system.web>
</configuration>
  我将写好的asp.net发布到服务器出现这个错误!
  将 <customErrors   mode= "RemoteOnly "   defaultRedirect= "mycustompage.htm "/>
改成 <customErrors   mode= "off问题依然 "   defaultRedirect= "mycustompage.htm "/>


------解决方案--------------------
注册好之后,检查IIS,你的网站的asp.net版本是否为2.0.

再不行就重新安装.Net Framework 2.0