Hi there, in order to have an image in your signature, the image will already need to be somewhere on the internet already in order for you to link to it. If it’s not, you can upload the image to another site (like imgur) then link to it here as [img]www.imageurl.jpg[/img]
If you want to put here the text of your signature, I can help you figure out where it’s going wrong. Or send it to me in a private message.