Boost with Dinkumware C++ Library !?

[nobody]

I use VC++ 6.0, with the standard library from 
Dinsumware.
When I include

#include <boost/property_map.hpp>

I get errors saying that 'ptrdiff_t' and/or 'size_t' 
are not a member of std. Why is this happening?
Should I create a special configuration for this case, 
with a different BOOST_NO_STD_ITERATOR_TRAITS or 
something of that sort?

Thanks,
Nestor