Code file for Master Page

I have two VS WEB site projects.  The first, I have a master page that has a code file.    I have this directive in the .master:

<%@ Master Language="vb" AutoEventWireup="false"  CodeFile="TaborModalPopup.master.vb" Inherits="Tabor.UI.TaborModalPopup" %>

And this work fine.  In another project I need to do the same thing - need a master page with a code file.   I have this directive in the .master:

<%@ Master Language="vb" AutoEventWireup="false"  CodeFile="TNCPModal.master.vb" Inherits="MyApp1.UI.TNCPModal" %>

It's the same directive, just the namespace and name of the page are different.

The second one gives me this error:  "Context" is not a member of "MyApp1.UI.TNCPModal".   I have attached the .master and .master.vb file for both.   I don't get it - why one works and one does not.

Thanks.
TNCPModal.master
TNCPModal.master.vb
TaborModalPopup.master
TaborModalPopup.master.vb