Lu_substitute is failing for matrix order >5

Hello folks,
I am very new at using boost,
I wanted to invert a matrix, in order to solve a least_square_mean problem
Sadly the inversion works for a matrix order less then 6 but not for more
The code I am using is from http://savingyoutime.wordpress.com/2009/09/21/c-matrix-inversion-boostublas/
Apparently it fails while executing lu_subsitute

Any hints ont what happen ?
thanks

template
bool InvertMatrix(const matrix& input, matrix& inverse){ //thks to 
typedef permutation_matrix pmatrix;
// create a working copy of the input
matrix A(input);

// create a permutation matrix for the LU-factorization
pmatrix pm(A.size1());
// perform LU-factorization
int res = lu_factorize(A, pm);
cout<<"\n No fail while factorization";
if (res != 0){
return false;
}
cout<<"\n A is:\n"< (A.size1()));
// backsubstitute to get the inverse
cout<<"\n Isgoing to inver";
lu_substitute(A, pm, inverse);
return true;
}

Output of A and pm are in this past

http://paste.opensuse.org/32062940


The error message
Check failed in file /usr/include/boost/numeric/ublas/lu.hpp at line 299:
detail::expression_type_check (prod (triangular_adaptor (m), e), cm2)
terminate called after throwing an instance of 'boost::numeric::ublas::internal_logic'
what(): internal logic


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