Parser Error in createeditpost.aspx


I get the error below after performing the search and replace of CSMedia:MediaGalleryPostViewer with ATGiControl:MediaGalleryPostViewer in createeditpost.aspx

Server Error in '/cs' 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 'ATGiControl:MediaGalleryPostViewerMediaTypeCondition'.
Source Error:
Line 142: <CSControl:ConditionalContent runat="server">
Line 143: <ContentConditions Operator="Or">
Line 144: <ATGiControl:MediaGalleryPostViewerMediaTypeCondition runat="server" MediaType="Video" />
Line 145: <ATGiControl:MediaGalleryPostViewerMediaTypeCondition runat="server" MediaType="Image" />
Line 146: </ContentConditions>

Source File: /cs/themes/3dzlight/media/createeditpost.aspx Line: 144