Mail Queue question

I can't seem to get the mail queue to show the email that the server recived
I changed the mail store location to another hard drive on the same server.
and I moved data base location to the same hard drive as the mail store.

Does that have any effect on the Mail Queue?

when is the mail queue supose to show mail? (incoming, out going, or both?)

the server sends and recives mail fine so i am sure it is something small but I dont know what

thanks in advance to anyone that can help me