Could not load file or assembly 'vjslib, Version=2.0.0.0 .. .\TemplateVSI\TemplateVSI.csproj

hi ı do http://www.asp.net/learn/ajax-videos/video-76.aspx on this video. but ı have to encounter this error
:
Error 1 Could not load file or assembly 'vjslib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.  C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\TemplateVSI\TemplateVSI.csproj 57 5 TemplateVSI