PGD Code link has been broken for aeons. It's insignificant.
As for the signature: If you have the URL for the image, then place it between [image][/image] tags in the signature box when you edit your profile. For example,
What do you mean, precisely? To set a signature, go to your Profile and scroll down to the section where it says "Signature." Insert the code I gave you and then go to the end of the page and click "Apply."
To use your signature in a post, check the radio box labeled "Add signature" just above "OK," "Preview," and "Cancel."
This thread's issue has already been resolved. There is absolutely no reason to continue posting, especially if it's to test your own signatures. Sig testing needs to occur in the appropriate thread.