why Im struggling on this issue?  I login.. go to profile... then to signature.... click on picture tab , then comes with a box with a url picture to insert.... I copy n paste from my photobucket then press summit but then says in green writing,,,

Success!

Signature changed successfully!

theres no change … still the default bf4 character's head

what am I doing wrong please... much apricated for any help ty

Try to upload the picture to imgur and then use the imgur link.

ok done what you said but the pic is on end of my post.... how do I get it on where the bf4 soldiers head it at please

Soldier profile picture on BF4DB is actually taken from battlelog, so you must do as ChimeitekinaNeko said. 

lol its in German is the site