Ot MSDNa:

"SYMPTOMS
The following error message appears if you define a member template class or function outside the class:

error C2059: syntax error : ''template<''
error C2065: 'T' : undeclared identifier



CAUSE
The compiler does not support out-of-class definition of member template functions and classes. Please refer to the C++ Standard, section 14.5.2, for information on member templates.
"