blais.h causes errors in Visual Studio

When I include blais.h and try to compile with Visual Studio 6, I get 22
errors:
 
z:\mtl-2.1.2-20\mtl\blais.h(134) : error C2989: '__recur_set<0,N>' :
template class has already been defined as a non-template class
z:\mtl-2.1.2-20\mtl\blais.h(134) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(175) : error C2989: '__mult<M,N,struct
mtl::row_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(175) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(185) : error C2989: '__mult<0,N,struct
mtl::row_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(185) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(201) : error C2989: '__mult<M,N,struct
mtl::column_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(201) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(211) : error C2989: '__mult<M,0,struct
mtl::column_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(211) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(253) : error C2989: '__rank_one<M,N,struct
mtl::row_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(253) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(263) : error C2989: '__rank_one<0,N,struct
mtl::row_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(263) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(277) : error C2989: '__rank_one<M,N,struct
mtl::column_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(277) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(287) : error C2989: '__rank_one<M,0,struct
mtl::column_tag>' : template class has already been defined as a
non-template class
z:\mtl-2.1.2-20\mtl\blais.h(287) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(344) : error C2989: '__copy<0,N>' : template
class has already been defined as a non-template class
z:\mtl-2.1.2-20\mtl\blais.h(344) : error C2988: unrecognizable template
declaration/definition
z:\mtl-2.1.2-20\mtl\blais.h(391) : error C2989: '__mult<M,0,K>' :
template class has already been defined as a non-template class
z:\mtl-2.1.2-20\mtl\blais.h(391) : error C2988: unrecognizable template
declaration/definition
 
Is there a solution for this problem? This occurs even with the
following simple source file, so the rest of my code can't be the cause
of the problem:
#include "mtl/blais.h"
void func(void)
{
 int a = 1;
}
 
PS: I searched all mtl files and couldn't find any other definitions of
the mentioned classes.
 
-----------------------------------------------------------------------
Job P. Mulder
Software Engineer
Xsens Technologies B.V.
http://www.xsens.com <http://www.xsens.com/> 
 
postal address:
P.O. Box 545
7500 AM Enschede
the Netherlands
 
phone: +31 (0)53 4836446
fax: +31 (0)53 4836445
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