adding pictures to posts..., can u help me please? Options

[*xcaitlinx*]

im really confused. i see people putting pics in their posts on createblog.com, and ive tried to do the same, but failed. i use photobucket to upload my pics, then i take the url of the picture and put it in my post. for god knows why, wen i click "post reply" a message pops up saying " domain incorrect ". what am i doing wrong?

thanks x3