Adding a background image to the header
I cannot comment, but some remarks


remove the files[] = pasture.jpg line, it isn't needed
you may enable your base theme, but it isn't necessary 
put your own themes (modules) under /sites/all/themes or /sites/default/themes, don not put them inside /themes (/modules), if this directory doesn't exist, just create them


Question, does your site works when using the Bartik theme?