using Directives And enum

[james . p . williams]

I want two classes to have the same enum list, but I want the list to
be in only one place.  I know I can include a common header within the
two class declarations, but wanted to use namespaces instead.  The
common header may contain stuff I don't want in the two classes.
Here's my attempt.

namespace Common{
   enum Zlorp {A,B,C};
}

class WantsZlorp {
public:
   using namespace Common;   //errors listed below refer to this line
};

class AlsoWantsZlorp {
public:
   using namespace Common;
};

int main(int,char **)
{
   WantsZlorp::Zlorp z1=WantsZlorp::A;
   AlsoWantsZlorp::Zlorp z2=AlsoWantsZlorp::B;
}

Using g++ 3.4.6, the indicated line gives me the following errors,
among others.

error: expected nested-name-specifier before "namespace"
error: expected unqualified-id before "namespace"
error: expected ';' before "namespace";
error: expected unqualified-id before "namespace"

Apparently, the second and last errors are redundant.  In summary, I
thought a using directive introduced into my scope all the names in
the namespace scope.  Is there a way to get what I'm after?

Thanks,

Jim