for blogspot/blogger the template often contains classic template
thats is :
get in to the template menu,click edit html,scoll your mouse down into the edit HTML code box,chose &click the link refers to the classic template and then clear it all
if you had already done it ,the next step is that you should :
1.open notepad programe ,then copy paste the new HTML code into your notepad
2.at HTML box colloum,add
3.if youe template contains images,don't forget to upload the head image by putting it on your new HTML code
4.click preview to see your work
5.ifyou like it