FSX Boeing 737 Default HSI ERROR

Hi, my name is Cesar I'm a B727 Pilot an a FS Lover, Could someone help me! Flying default B737, on HSI I got 2 problems:1) - When you set an ADF frequancy, and select Adf1 and Adf2 on MCP, you get two differents directions, ADF1 point to NDB station and ADF2 is freezing to the right.2) - When a VOR is Selected on MCP, and you change the course on MCP, BOTH, change the course, the HSI and the Needle (Blue), from NAV1. It's wrong just the HSI must Change the course, they are linked wrong! Someone has an explanation for this?