AWKPATH question

I have set enviroment AWKPATH in ~/.bash_profile including ~/lib/awk
which contains some function
at command line using, there's no problem.
fang@[EMAIL PROTECTED]
 ~
$ uname -a
CYGWIN_NT-5.1 bash 1.5.25(0.156/4/2) 2008-03-05 19:27 i686 Cygwin

fang@[EMAIL PROTECTED]
 ~
$ echo $AWKPATH
/usr/lib/awk:/home/fang/lib/awk

fang@[EMAIL PROTECTED]
 ~
$ echo abcd |awk -f reverse.awk  --source '{print reverse($0)}'
dcba

put in a file ,I get an error

fang@[EMAIL PROTECTED]
 ~
$ cat junk
#! /bin/gawk -f reverse.awk --source

  {
   print reverse($0)
  }

fang@[EMAIL PROTECTED]
 ~
$ echo abcd |./junk
gawk: fatal: can't open source file ` reverse.awk --source ' for
reading (No such file or directory)

calling gawk from shell, there's no problem

$ cat junk2
#! /bin/bash

gawk -f reverse.awk --source '{print reverse($0)}'

fang@[EMAIL PROTECTED]
 ~
$ echo abcd | ./junk2
dcba

how to solve the problem, thanks

rgd

twf