Create A Forum - Support Forums

I'd really appreciate a reply! 


I'm moving my forum back from the Christmas theme to the default template which this support forum also uses.


I want to put an image as a header, like the Christmas theme has by default (the Christmas tree,) instead of that blue space at the top which the default brings (unlike this forum, our logo drags the space down quite a bit so a lot of it is plain and wasted)


Found the part to modify, which matches the position of the code on the Christmas theme, but nothing is happening when I paste the image URL ... Well, a square of it is appearing then disappearing and reappearing in the background 


So: What am I doing wrong?
      And will I need to copy over some code from the Christmas theme to make it work with an image for sure, as     this style clearly does?


Please, I'd really be so grateful if you could take just a few moments to reply! Thank you!

Thank you for your reply 


I've managed to do it!


BUT am now having trouble finding how to change the colour of the "Hello User" element - I believe I've located it, but I can't see any mention of colour change 


Forum URL is: http://www.cacheWalker.createaforum.com