How to specialize a template member funcion depending on the class' template arguments?

I would like to write this:

template<typename T1, typename T2>
 class OK
 {
     T1 t1;
     T2 t2;
 
 public:
     template<typename TX> const TX & GetRef() const;
 };
 
 template<typename T1,typename T2>
 template<>
 const T1 & OK<T1,T2>::GetRef<T1>() const { return t1; }
 

Which VS10 fails to compile.

To check my understanding of template specialization, I tried and compiled this all right:

typedef int  T1;
 typedef char T2;
 class OK
 {
     T1 t1;
     T2 t2;
 
 public:
     template<typename TX> const TX & GetRef() const;
 };
 
 template<>
 const T1 & OK::GetRef<T1>() const { return t1; }
 

What am I missing ? Is what I want to do even possible ?

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