Please contact an organisation based in London UK and Belarus called The Together Plan. They are helping the remnants of the Jewish communities in Belarus realise their potential of carrying out research into families who used to make up an important part of pre-20thC European Jewry. The researchers have huge advantages: they speak Russian, Belarussian and English; they live in the area; they are only too familiar with the bureaucratic ways of this totalitarian State; they are trained and mentored by Western experts. The Directors can provide you with testimonials. I'm sure they will get through the brick wall !