Link to image in sig works intermitently

[Neji-Aniki-sama]

I am trying to add an image to my sig, but it doesn't stay there.
It works at first, but for some reason, when I come back to the forum, I got the red x box.
I fix again, it works for a while then I got the same error.
Anyway to fix it?
Thanks.

[Wilik]

Get a new host to host your image.