problems after moving blog

I just moved my site from my old host to my new host:

I installed a new wordpress, replaced WP-content and imported my database.

the problem I now have, is that none of my posts are showing. I can see them in the database in PHPMyAdmin, but not on the site. The theme looks OK though.

I noticed there are 2 kinds of table prefixes in the database now. 1 from the imported database and one from the new install. when I change the table prefix in the WP-config file to the one fromt the imported database, the posts show up, but the layout is gone and I can’t login to /wp-admin anymore.

can anyone help? this is driving me mad!