Re: compilation error with function template parameter

The following quesion is NOT a HOMEWORK problem.

Consider the following x.cpp:

#include<cstdlib>
#include<iostream>

using namespace std;

template<class T>
inline void fn(void (T::*memfnPtr)())
{
         return;
}

class Test
{
public:
     void member();
     void member() const;
};

inline void Test::member(void)
{
         cout<< "Test::member() called"<< endl;

         return;
}

inline void Test::member(void) const
{
         cout<< "Test::member() const called"<< endl;

         return;
}

int main()
{
         fn(&Test::member);

         return EXIT_SUCCESS;
}

When I compile this program with g++3.4.3 as
g++ -std=c++98 -pedantic -Wall -Wextra x.cpp

I get the following compilation error:
x.cpp: In function `int main()':
x.cpp:35: error: no matching function for call to `fn(<unknown type>)'

Why do I get this compilation error ? Kindly explan. Please help to
fix this error. I do not get the compilation error, if I have the
function template 'fn()' as follows:
template<class T>
inline void fn(void (T::*memfnPtr)() const)
{
         return;
}

Note that in the above modified version of 'fn()', I have added
'const' to the parameter. Why don't I get the compilation error
for this version but I do get for the earlier version ?