Problem getting my old theme running

Help! I upgraded to WP 1.5 from 1.2. When I tried to upgrade my old template, I followed all the directions from here:

http://codex.wordpress.org/Upgrade_1.2_to_1.5

If you go to my site you’ll see my problem. For some reason, all my posts and comments are gone when I use my old theme. Can anyone help me fix it?

My site is here: http://www.cantkeepquiet.com/