I have a new dish pointed corectly toward HELLAS2 (39E) but I can't receive ANY channel sent with vertical polarization. Channels with horizontal polarization works perfectly. The signal strength shows 90% for all channels with horizontal polarization but 0 for all those with vertical polarization. The LNB is universal and I have also tried to replace it by another one. Its rotation (skew) is correctly set, according to my location (24 degrees clockwise). I have tried to turn it all 360 positions but no luck with reception of channels with vertical polarization. Any idea what to do?