User blog:Nemerian/Dawnguard problems pls halp

I am writing this because i hope someone out there can help me. I play Skyrim on PC and i downloaded Dawnguard a few days ago. It came in .zip format and i unzipped the files (a .bsa and .esm file) to the "Data" folder in my Skyrim directory. However, after i start up the launcher, the "Data files" section on the launcher can't be accessed. It doesnt "light up" when i hover the cursor over it like the other "sections" do. My copy of skyrim is patched to version 1.6.