C++: Migrating dll from VS 2008 to VS 2010: error C2678 - visual-c++

Question

I'm migrating the code of an dll, developed with C++, from Visual Studio version 2008 to 2010.
I'm facing this error below which is related to the 'C:\Program Files\Microsoft Visual Studio 10.0\VC\include\xstring'.
Error C2678: binary operator '!=': no operator found which takes a left-hand operand of type 'c_allocator<_Ty>' (or there is no acceptable conversion).
The error occurs with the line 'class c_allocator: public std::_Allocator_base<_Ty>{'.
#include <stdlib.h>
#include <vector>
#include "Synchro.h"
template<class _Ty>
class c_allocator: public std::_Allocator_base<_Ty>{
public:
typedef _Allocator_base<_Ty> _Mybase;
typedef typename _Mybase::value_type value_type;
typedef value_type _FARQ *pointer;
typedef value_type _FARQ& reference;
typedef const value_type _FARQ *const_pointer;
typedef const value_type _FARQ& const_reference;
typedef _SIZT size_type;
typedef _PDFT difference_type;
template<class _Other>struct rebind{
typedef c_allocator<_Other> other;
};
pointer address(reference _Val) const {
return (&_Val);
}
const_pointer address(const_reference _Val) const {
return (&_Val);
}
c_allocator() _THROW0() {
}
c_allocator(const c_allocator<_Ty>&) _THROW0() {
}
template<class _Other>c_allocator(const c_allocator<_Other>&) _THROW0() {
}
template<class _Other>c_allocator<_Ty>& operator=(const c_allocator<_Other>&) {
return (*this);
}
void deallocate(pointer _Ptr, size_type) {
CustomAlloc::LinearAllocHolder<1>::alloc.freemem(_Ptr);
}
pointer allocate(size_type _Count) {
return (pointer)CustomAlloc::LinearAllocHolder<1>::alloc.getmem(_Count*sizeof(value_type));
}
pointer allocate(size_type _Count, const void _FARQ *) {
return (allocate(_Count));
}
void construct(pointer _Ptr, const _Ty& _Val) {
std::_Construct(_Ptr, _Val);
}
void destroy(pointer _Ptr) {
std::_Destroy(_Ptr);
}
_SIZT max_size() const _THROW0() {
_SIZT _Count = (_SIZT)(-1) / sizeof (_Ty);
return (0 < _Count ? _Count : 1);
}
};
Any hint much appreciated -
thanks in advance -
surplus