[Asterisk-Security] can't load module res_srtp.so

[yr diana]

 I have to build srtp with this instruction :
http://voipinfo.org/wiki/index.php?page=Asterisk+SRTP,
[^<http://voipinfo.org/wiki/index.php?page=Asterisk+SRTP,>
]
i got a trouble when i run asterisk
this the trouble


[Jul 6 11:05:39] WARNING[24807]: loader.c:363 load_dynamic_module: Error
loading module 'res_srtp.so': /usr/lib/asterisk/modules/res_srtp.so: cannot
restore segment prot after reloc: Permission denied
[Jul 6 11:05:39] WARNING[24807]: loader.c:613 load_resource: Module
'res_srtp.so' could not be loaded.

please tell me where i got wrong.
when i compile bootstrap.sh i delete

if test "${ac_cv_path_SED+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
     for ac_i in 1 2 3 4 5 6 7; do
       ac_script="$ac_script$as_nl$ac_script"
     done

     #echo "$ac_script" | sed 99q >conftest.sed
     #$as_unset ac_script || ac_script=
     #_AC_PATH_PROG_FEATURE_CHECK(SED, sed gsed,
    #_AC_FEATURE_CHECK_LENGTH([ac_path_SED], [ac_cv_path_SED],
    # ["$ac_path_SED" -f conftest.sed]))
fi
echo "$as_me:$LINENO: result: $ac_cv_path_SED" >&5
echo "${ECHO_T}$ac_cv_path_SED" >&6
 SED="$ac_cv_path_SED"
  rm -f conftest.sed

because when i delete line 3589 can't ran configure
please help me.
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