Chaz, it looks like you're still trying to link to your pic file on your hard drice -
C:/My documents.....etc.
This is NOT how to do it!
You NEED to (as far as i know anyway) get a photo album set up for you by an admin of this site (send a PM to David), and then upload your car pic into your album.
A signature pic must be 175 x 150 pixels, and no larger than 25kb and when you get it into an album, you can post the pic by typing something like
this:-
http://www.uk-mkivs.net/upload/members/........../,
where ........... is your user name (chaz [

] ) and ,,,,,,,,,, is the name of the pic, i.e. - golf2.JPG
NOTICE -- use the name AND the .JPG extension in this link.
ALSO NOTICE -- use this: ......... around it, and NOT the 'img' bit either side with the whole lot in square brackets as you tried before[!]
Thats the way i did mine anyway. It might sound like it, but i'm not trying to come accross as a smart ***, just wanna emphasise what not to do, and let you know where you went wrong before and let you know how to correct it, and help you out [

]
Hope you get it right, post here or PM me if you're still stuck mate.