B1900 checklist

For some reason, the checklist will not show up in the kneeboard in my B1900. All other kneeboard screens show up ok, but not that one. I looked in the 1900 folder and the checklist is there and can be viewed in a web browser, but won't show up in the sim. I also checked my aircraft file to make sure the checklist name is properly typed in, which it is. Any suggestios as to what may be the problem or how to fix it? This problem only occurs in the 1900, not any other aircraft.ThanksKP