Hoster won't read cd tracts

[phy57]

I tried as S. Parks suggested. Also, I read on another forum to go to default drive and unclick drive then reclick and turn off computer. This did work for me. Sometimes Hoster will not open when I have the recorder turned on. Now I am having problems with graphics. The first cds I imported worked fine. Now I am having problems sometimes with tract 15, sometimes all of them. My originals work fine on a player. I read on forum to turn off running programs. I am going to try that. I have a 9100 Dell computer and a 4824a Plextor recorder converted to external, 160G external hard drive. It is using space fast. I think I will try at 96k.