Help with adding sig

[TehStickle]

I can`t add my sig. It keeps saying "Invalid image type in your signature image". Will someone help me here?

Pic: http://imageshack.us/content_round.php?page=done&l=img849/7119/presentation1b.png

 

[Doctor]

Same with me, i dont know what is wrong -_-

 

[TehStickle]

Cant anybody help fix this problem

 

[Kev]

What type of picture file is it? It'd help if you posted a link to the image you're trying to use.

 

[TehStickle]

What type of picture file is it? It'd help if you posted a link to the image you're trying to use.

Added to first post. It should look like this: