screening libraries - pharmacophore

Hi, I'm having a problem. I'm currently doing pharmacophore screening for a research and I have already screened some compounds. However, I still have to prepare, build 3D database and screen the known inhibitor of my protein just to provide a basis for the study and to compare the results of the known inhibitor to the other compounds that I am testing.

This is my problem, when I screen the known inhibitor and the results show, it says that 0 compounds were screened. How do I fix this? I need to have results for my inhibitor.