Problem with: Walkthrough: Extending Managed VSPackages By Using Automation

I encountered a problem while trying this: Walkthrough: Extending Managed VSPackages By Using Automation

Address : http://msdn.microsoft.com/en-us/library/vstudio/bb165962(v=vs.100).aspx

I must have done something wrong, because I get errors in the MenuItemCallback routine:

Error    1    'DTE' is ambiguous in the namespace 'EnvDTE'.    c:\users\frank\documents\visual studio 2010\Projects\Auto\Auto\AutoPackage.vb    82
Error    4    'Windows' is ambiguous in the namespace 'EnvDTE'.    c:\users\frank\documents\visual studio 2010\Projects\Auto\Auto\AutoPackage.vb    86
Error    5    'Window' is ambiguous in the namespace 'EnvDTE'.    c:\users\frank\documents\visual studio 2010\Projects\Auto\Auto\AutoPackage.vb    87
Error    6    'OutputWindow' is ambiguous in the namespace 'EnvDTE'.    c:\users\frank\documents\visual studio 2010\Projects\Auto\Auto\AutoPackage.vb    90
Error    7    'OutputWindowPane' is ambiguous in the namespace 'EnvDTE'.    c:\users\frank\documents\visual studio 2010\Projects\Auto\Auto\AutoPackage.vb    91

I am using Visual Studio 2010, and I have the Visual Studio 2010 SDK SP1.

How can I correct these errors?

Regards,

Frank