Problem changing background image in header - Joomla! Forum - community, help and support

hi there
i'm new joomla , web site creation in general, please patient me. don't use enlgihs language on interface. hope translation correct.

i explain problem
i change default background image in logo header of homepage , looking around web found 2 method.

method 1:
-go "template manager"
-swich "styles" tab "templates" tab
-select "beez_20 settings , files"
-select "modify css/personal.css"
-scroll till

.logoheader
{

background: #ffffff url(xxxxx)no repeat-bottom right;
color: #fff;
min-height:200px;
margin:0em 10px 0 10px !important;

}
-change url (xxxxxx) needed url

well method 1 simple , clean. problem doesn't work. nothing change. tried change image, remove url code, change color. happens nothing

method 2 (http://forum.joomla.org/viewtopic.php?f=615&t=750740)
this 1 obscure me because cannot understand "directory" mentioned , it's located.

thank you


edit
i have no idea how or why method 1 seems magically work. problem removed default header can't use own image

you find file called personal2.png in folder http://yoursite.com/wherever joomla is(maybe root)/templates/beez_20/images/personal/

you can replace new image.