  We report unconventional transport properties of HgTe wells with inverted
band structure: the resistance does not show insulating behavior even when it
is of the order of $10^2\times h/2e^{2}$. The system is expected to be a
two-dimensional topological insulator with a dominant edge state contribution.
The results are inconsistent with theoretical models developed within the
framework of the helical Luttinger liquid.
