problem with changing framerate - modfps, --export_fps

Hello,

I try to change fps of one movie, but the fps is not changed. I try to 
do it this way:
$ transcode -i test_1.avi -o test_2.avi --export_fps 23 -J fps

The output of transcode looks like that:

transcode v1.1.2 (C) 2001-2003 Thomas Oestreich, 2003-2009 Transcode Team
libdvdread: Encrypted DVD support unavailable.
************************************************
**                                            **
**  No css library available. See             **
**  /usr/share/doc/libdvdread4/README.Debian  **
**  for more information.                     **
**                                            **
************************************************
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdread: Encrypted DVD support unavailable.
************************************************
**                                            **
**  No css library available. See             **
**  /usr/share/doc/libdvdread4/README.Debian  **
**  for more information.                     **
**                                            **
************************************************
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
[transcode] V: auto-probing     | test_1.avi (OK)
[transcode] V: import format    | DivX 5.x in RIFF data, AVI (module=ffmpeg)
[transcode] A: auto-probing     | test_1.avi (OK)
[transcode] A: import format    | MPEG ES Layer 3 in RIFF data, AVI 
(module=mp3)
[transcode] V: AV demux/sync    | (1) sync AV at initial MPEG sequence
[transcode] V: import frame     | 480x352  1.36:1  encoded @ UNKNOWN
[transcode] V: bits/pixel       | 0.426
[transcode] V: decoding fps,frc | 25.000,3
[transcode] V: video format     | YUV420 (4:2:0) aka I420
[transcode] A: import format    | 0x55    MPEG ES Layer 3 [44100,16,1] 
  96 kbps
[transcode] A: export           | disabled
[transcode] V: encoding fps,frc | 25.000,3
[transcode] A: bytes per frame  | 3528 (3528.000000)
[transcode] A: adjustment       | 0@1000
[transcode] V: IA32/AMD64 accel | sse mmx cmove asm
[transcode] warning: no option -y found, option -o ignored, writing to 
"/dev/null"
[transcode] V: video buffer     | 10 @ 480x352 [0x2]
[transcode] A: audio buffer     | 10 @ 44100x1x16
[import_mp3.so] v0.1.4 (2003-08-04) (audio) MPEG
[import_ffmpeg.so] v0.1.15 (2008-01-28) (video) ffmpeg: MS 
MPEG4v1-3/MPEG4/MJPEG
[filter_fps.so] v1.1 (2004-05-01) convert video frame rate, gets 
defaults from -f and --export_fps
[filter_fps.so] no options
[filter_fps.so] converting from 25 fps to 25 fps, postprocessing
[export_null.so] v0.1.2 (2001-08-17) (video) null | (audio) null
[import_mp3.so] MP3->PCM
[import_mp3.so] tcextract -a 0 -i "test_1.avi" -x mp3 -d 0 | tcdecode -x 
mp3 -d 0 -z 12000


What do I do wrong?

Thanks in advance for your advice!