Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Unknown server tag 'dx:ASPxTreeList'.

Source Error:


Line 11:     
Line 12:     <div style="margin: 15px;">
Line 13:         <dx:ASPxTreeList ID="treeList" runat="server" AutoGenerateColumns="False" Width="100%"
Line 14:                 ParentFieldName="Pai" Theme="Office2010Black">
Line 15:                 <Settings ShowColumnHeaders="False" />

Source File: /sitemap.aspx    Line: 13


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4330.0