Image in Signature problems

[iGuest 3]

Ok I have read forum after forum on trying to fix this issue, here and at Nuke Cops.
Im using php-nuke 7.5
and when I try to use an image in my signature I get just the code nothing else. Im able to use the code in the forum message and image will appear but not in the signature.
I have changed the code in bbcode.php to this

// [img=image_url_here] code.. $text = preg_replace("#[img=((ht|f)tp://)([^ ?&="nrt<]*?(.(php[^[]*|jpg|jpeg|gif|png)))]#sie", "'[img:$uid]1' . str_replace(' ', '%20', '3') . '[/img:$uid]'", $text);

and still nothing.
I have allowed images in sig. and everything I could think of, any other ideas?

[iGuest 3]

what is the extension of the image you wanna place. Right now, that I see in this code that only images that end with the extension .jpg, .jpeg, .gif and .png will be showed. Other files like .bmp and .ico will not be showed.

Tip:
Change

// [img=image_url_here] code.. $text = preg_replace("#[img=((ht|f)tp://)([^ ?&="nrt<]*?(.(php[^[]*|jpg|jpeg|gif|png)))]#sie", "'[img:$uid]1' . str_replace(' ', '%20', '3') . '[/img:$uid]'", $text);

into

// [img=image_url_here] code.. $text = preg_replace("#[img=((ht|f)tp://)([^ ?&="nrt<]*?(.(php[^[]*|jpg|jpeg|gif|png|bmp|php|ico|pcx)))]#sie", "'[img:$uid]1' . str_replace(' ', '%20', '3') . '[/img:$uid]'", $text);

See what is changed?

jpg|jpeg|gif|png

Turned into

jpg|jpeg|gif|png|bmp|php|ico|pcx