explicit specialization in non-namespace scope

[Sujatha, Narayanan (IE10)]

I am using gcc 3.1 compiler for power pc. I am getting the following errors
if I specialize member templates.

TEST_Stream_accessor.h:22: explicit specialization in non-namespace scope
`class TEST::Stream_accessor'
TEST_Stream_accessor.h:23: invalid use of undefined type `class
TEST::Stream_accessor'
TEST_Stream_accessor.h:9: forward declaration of `class
TEST::Stream_accessor'
TEST_Stream_accessor.h:24: confused by earlier errors, bailing out

Code Used:

namespace TEST
{
   class Stream_accessor
   {
   public:
      Stream_accessor();
      virtual ~Stream_accessor();

      template < class Stream >
      static void create_stream(Stream * * stream_ptr)
      {}

      template < >
      static void create_stream  < std::istringstream > (std::istringstream
* * stream_ptr)
      {
         * stream_ptr = new std::istringstream();
      }
   };
}

I am getting "is not a valid type for a template constant parameter"  if I
use the following syntax:

      template < std::istringstream >
      static void create_stream (std::istringstream * * stream_ptr)
      {
         * stream_ptr = new std::istringstream();
      }

'struct std::basic_istringstream<char, std::char_traits<char>,
std::allocator<char> >' is not a valid type for a template constant
parameter
`struct std::basic_ostringstream<char, std::char_traits<char>,
std::allocator<char> >' is not a valid type for a template constant
parameter
`struct std::basic_ifstream<char, std::char_traits<char> >' is not a valid
type for a template constant parameter
`struct std::basic_ofstream<char, std::char_traits<char> >' is not a valid
type for a template constant parameter

Please tell me as to what the syntax should be to implement specializations
for member templates ( The first method works fine with MSVC compiler )

Thanks,
Sujatha