Custom Header Background Image

Hello, I followed this prior thread to add a background image to my header ...http://www.inkthemes.com/community/threads/adding-tiled-image-to-header-background.4535/#post-17942

...and that worked for the desktop version, but the mobile version is not loading the image. Do we need to add that same image code to any other file (other than just what was mentioned in that previous thread, adding code to "styling options"

Code:

.header_wrapper .header {
background: url("http://www.mysite.com/wp-content/uploads/2013/05/myimagefilename.jpg") top left!important;
}

) in order to show up for the mobile display?
We're using the black color template and that black background displays as well as the logo, but not the header wrapper background image. I cleared cache on my mobile phone but that didn't help it load any different either. I can PM you the links if you need a direct look. Thanks!
desktop browser=firefox, phone=droid

 

... well, now that I've tried to see it in Chrome and on different computer, it's not showing up at all... weird. Tried refreshing and clearing cache, but must not be doing something right, still not displaying, though I can see it when I 'view site' via the wp theme dashboard. So, please advise/confirm how we should be entering this properly - thanks!

 

Ok, display resolved now after continuing to work at it and adjusting ending parameters.