sinb000,
"N/A" means that the vlookup formula cannot find what you are searching for in the corresponding data. If you know the what your are looking for is in the data, one thing you may want to do is check the data for extra spaces before or after the text. If the data does not match what you have in the vlookup formula, it will not find it.
Charles
After posting, I noted tha VoG posted before me. I would go with his suggest first. He is way above me in using Excel.
C.