I played around with banners and even after I deleted that ad, header is still wide
 

I was trying to put some banner and I wen to
admincp-advertising-add new ad
and tried tried different locations such as header1 header2 below navbar
and deleted the ad
but, my website`s header is still think as if there is still a banner!
how do i fix this problem
my header is very thick, wide, ugly
please help!