I try this before, just start with this template tags, but I recive random names and Ids - look before
Could You confirm that this works for You after refreshing page and still have this same id/name ?
Now Im loged as a admin -> id=1, with your code I have {user_id} from user which upload random image. I dont remeber it is mod or bulid fx, I use&set 4images ages ago.
Mayby You could show my where {user_id} can by changed by fx coping/modyfing to something like {logged_user_id}
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php is enabled in templates - I try to integrte now 4images and wordspressmu, so urls are strange
regards
Pawel