Call one image by distinct id

[Claudio Reis]

Hi all,
I looked it from net with no success...
I have the following DB:

storyid fileid
01------ 01
01------ 02
01------ 03
01------ 04*
02------ 01
02------ 02
02------ 03*
03------ -
03------ -
04------ 01*
.
.
.

All I want is the last one image from each *storyid*, in this case I would have tree images (there are much more storyid...):
01------ 04
02------ 03
04------ 01
.
.
.


I tried the following two queries but there´s something wrong

#1) $result = mysql_query("SELECT DISTINCT storyid FROM atx33p_stories_files ORDER BY storyid DESC LIMIT 7"); //I´ll limit the result to seven

#2) $result = mysql_query("SELECT MAX(storyid) FROM atx33p_stories_files GROUP BY storyid DESC LIMIT 7"); //In this case, I read that it is a hack, but I have no success...

Solution number one gave me the correct storyid(s), but it can not call the respective image, so I tried:

#1) $result = mysql_query("SELECT DISTINCT storyid, fileid FROM atx33p_stories_files ORDER BY storyid DESC LIMIT 7"); //I´ll limit the result to seven

But this returned me the following:
01------ 01
01------ 02
01------ 03

Variations of the solutions give me something like that, or error.

Please, can someone help me?
Thanks in advanced!!!!
Claudio (Brazil)