Why are questions not showing up?

When I create a question on my site, it goes to 404 error
Also the back end questions is showing 3 on the tabs, but there are no questions shown.

I cleared the database under the TOOLs section of anspress, but now when I make a question it doesnt show.
Can anyone advise me how to do a CLEAN INSTALL of anspress, with nothing left behind please.
I deleted the plugin and yet stuff still remains from the previous installation?

Thankyou.