Could not load type httpModules

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C#

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Online active users counter in ASP.NET[^]

i have try this link for counting number of online users but when adding the OnlineActiveUsers.dll ference to my project in second step add httpModules in web.config . when running web application it shows following exception

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load type 'OnlineActiveUsers.OnlineUsersModule'. (D:\ASP.NET\onlineuser\web.config line 85)

Source Error:


Line 83:
Line 84:       <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Line 85:        <add name="OnlineActiveUsers" type="OnlineActiveUsers.OnlineUsersModule"/>
Line 86:
Line 87:        </httpModules>


Source File: D:\ASP.NET\onlineuser\web.config    Line: 85

how to used the online user count using onlineActiveUsers.dll in project ?

Thanks in advance