END ing in a cgi script

Hi all,
   My perl-cgi application creates some temporary files and a temporary 
table which I would like to clean up as I exit the program.  I tried 
writing a perl END block, but found that did not work.  It appeared that 
to the cgi interpreter END{} had no special meaning and the code inside 
the END block was just executed in turn, instead of at the exit of the 
program.  Are there techniques to clean up the environment on leaving the 
application?

Thanks
Mary