277897 wordpress fix (tag problem)

Hello, I have wordpress 2.7 after trying to activate/deactivate the plugin Dean Migration plugin ([login to view URL]) the categories and the tags are not still shown, but are presente in the database. I haven't an updated backup. Data are presents, so I need an expert of wordpress who could fix the problem. I prefer to install the plugin mentionned, otherwise I could use the original permalink structure, but I need that tags will be shown