Search Block

Hi All, after upgrading my store recently, I can't seem to get my search block functioning and looking the way I want it. My header has a white background and if I add the search block it stays hidden. I have resorted to adding it to the top panel which has a grey colour. If I look at the demo site, the search block has a different look and feel. How can I edit this without doing any coding?

here is my website

Hi Folks, any help here?