FMC Radio Operations

What am I doing wrong?Sometimes when I manualy input VOR name into 1L or 1R of the Nav Radio menu the proper VOR frequency is displayed; however, no name for this VOR is diplayed. For example, when I enter LAX into 1L a proper frequency of 113.60 shows up but name field is empty. It should display LAX. It is a headache since I cannot fly radials. I enter a radial in 2L but FMC will not display current plane's radial from LAX VOR and in a map screen no radial line is displayed.Again, this problem is only related to certain VOR's and I believe I noticed this error after installing Current Navigation Database and Current SID/STAR Database (0512).Richard Rudol