you need to check 2 things.... See if the file's permissions are executable and where perl is located.
1. Go into the dir the script is and type
it will be something like this...
-rwxr-xr-x 1 zymos zymos 104 Nov 21 17:28 azScript
It needs to have 'x' for executable
-(rwx for user)(r-x for group)(r-x for everybody)
it does not need to be exacty like shown above, it just need x for user
If its not run
'chmod 755 ivtvfwextract.pl'
try running it again
it may say something like perl not found.....
you can try
'perl ivtvfwextract /path/to/firmware'
or find where perl is
type 'which perl'
then edit the first line of the script to have the correct location for perl
hope this is enough, but not too much intel