buzzki11

If you deleted your wp-content folder, then your theme is gone (along with your plugins and anything in the uploads folder), and so wordpress can’t see the files it is looking for.
If there is no wp-content folder, make sure you copied the one from the wordpress folder back into the public_html/redmosquito folder.

So it goes something like this…

Your public_html folder is where all your wordpress files are located. But… when you downloaded wordpress-2.5.zip to public_html and then unzipped it, all the new files went into a new folder called wordpress. If you look in the wordpress folder, you will see all the new files for 2.5. You need to copy all those files and folders back up into the public_html folder.

Go to your wp-content/plugins directory. Move all the plugins out of that directory to someplace safe. Run the upgrade again. Then if all is well, move your plugins back in.

Stupid question, but are you sure you upgraded your files? Be default when you expand the .zip file it dumps all the new files into the directory called wordpress. So, in your case, you would have to copy all those files back up one directory into /public_html/redmosquito/ for your install to see the new files.