You can't just backup your database because they are two different forum softwares. If one of them lets you export or import to/from the other forum's database format then you could do that, but simply copying the database won't work.
well ill et the community deal with the old forums then
No,when switching,back up your MSQL database then export your files into a folder in your documents,then,transfer them to your new site go to phpmyadmin and import the sql into your new msql.