The type or namespace name 'Shape' could not be found (are you missing a using directive or an assembly reference?)

Hi,
I am working on ASP.net 1.1
I am using Aspose Version: 5.1.0.0
I am getting the error
The type or namespace name ‘Shape’ could not be found (are you missing a using directive or an assembly reference?)
at line

(shapes[0] as Shape).ImageData.SetImage(HttpContext.Current.Server.MapPath("") + "\\Images\\assets\\logo_nucleus.gif"); 

Below is my code
Please guide

Many Thanks,
Code snippet:
using Aspose.Words;
Aspose Version: 5.1.0.0

Document doc = OpenDoc(strTemplate); doc.MailMerge.ExecuteWithRegions(dataSet); 
HeaderFooter myHeader = doc.FirstSection.HeadersFooters[HeaderFooterType.HeaderPrimary]; 
NodeCollection shapes = myHeader.GetChildNodes(NodeType.Shape, true);

// Error at below line
(shapes[0] as Shape).ImageData.SetImage(HttpContext.Current.Server.MapPath("") + "\\Images\\assets\\logo_nucleus.gif"); 
doc.Save(HttpContext.Current.Server.MapPath("") + "\\pdf\\Supplier\\TestDoc.doc");

Hi
Thanks for your inquiry. Please try adding Aspose.Words.Drawing namespace or using Aspose.Words.Drawing.Shape.
Hope this helps.
Best regards.