external script stays in <defunct> state after executing

[rashad]

Still can't solve the problem.
External script fired according to acct_users file stays in <defunct> state
for every call.

acct_users file:
    DEFAULT Acct-Status-Type == Stop
        Exec-Program = "/usr/local/sbin/testacct.php"

My conf:
Debian Linux 3.0
Freeradius: 1.0.4