running a ajax enabled web site on the server that not support ajax,

Just copy the ajax dlls to you application's bin directory.

Refer to http://forums.asp.net/thread/1480481.aspx for more information.

I do this, but i get this error page :

Server Error in '/' Application.

---

Security Exception

Description:The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details:System.Security.SecurityException: Request for the permission of type 'System.Configuration.ConfigurationPermission, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' failed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SecurityException: Request for the permission of type 'System.Configuration.ConfigurationPermission, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' failed.]
 System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0
 System.Security.CodeAccessPermission.Demand() +59
 System.Configuration.BaseConfigurationRecord.CheckPermissionAllowed(String configKey, Boolean requirePermission, Boolean isTrustedWithoutAptca) +65

---

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210

what can i do, to resolve this problem?

hello.

again: you can only drop the dlls if your web app is running in full trust.

Just add the following to your Web.Config file to gain full trust.

<system.web>
<trust level="Full"/>
-
-
-
</system.web>

Glenn