Inherits MembershipProvider Type Expected

Using vs 2005.

I downloaded the code from

http://msdn.microsoft.com/en-us/library/6tc47t75(v=vs.80).aspx

I am getting error on the fllowing line 

Public NotInheritable Class OdbcMembershipProvider
Inherits MembershipProvider  <-- Type expected.

I have references to 

system.web.dll and system.configuration.dll

What am I missing

Thanks