'X is not a template' error

I'm having trouble declaring a template class. I've tried an number of ill-readable and non-sensical combinations.

template <class C, class M >
class BlockCipherGenerator : public KeyGenerator
{
  ...
  private:
      M < C > m_cipher;
};

And

template <class C, class M >
class BlockCipherGenerator : public KeyGenerator
{
  typedef typename C::value_type CIPHER;
  typedef typename M::value_type MODE;
  private:
      MODE < CIPHER > m_cipher;
};