spumux not working
 

I can't get the spumux to work. No subtitles are added (I'm trying to add picture subtitles in order to make dvd-menu).
When I run spumux I get following output:
DVDAuthor::spumux, version 0.6.11.
Build options: gnugetopt iconv
Send bugs to <dvdauthor-users@lists.sourceforge.net>

INFO: Locale=en_US.UTF-8
INFO: Converting filenames to UTF-8
INFO: PNG had 2 colors
INFO: PNG had 4 colors
INFO: PNG had 2 colors
INFO: Autodetect 0 = 37x157-343x203
INFO: Autodetect 1 = 397x157-703x203
INFO: Autodetect 2 = 37x217-343x263
INFO: Autodetect 3 = 397x217-703x263
INFO: Autodetect 4 = 397x517-703x563
INFO: Pickbuttongroups, success with 1 groups, useimg=1
INFO: Found EOF in .sub file.
INFO: Max_sub_size=4794
WARN: Read 0, expected 4
INFO: 1 subtitles added, 0 subtitles skipped, stream: 32, offset: 0.24

Statistics:
- Processed 0 subtitles.
- The longest display line had -1 characters.
- The maximum number of displayed lines was 0.
- The normal display height of the font arial.ttf was 0.
- The bottom display height of the font arial.ttf was 0.
- The biggest subtitle box had 4794 bytes.

But when I open the video, no suptitles are shown. Also if I use the newly created mpg as a dvd-menu, dvd wont play at all, because the title.mpg is corrupted?

spumux controll file is:

<subpictures>
<stream>
<spu
force="yes"
start="00:00:00.00"
image="main6.png"
select="main6s.png"
highlight="main6h.png"
autooutline="infer"
outlinewidth="6"
autoorder="rows">
</spu>
</stream>
</subpictures>

the originall mpg file i have created with mencoder.

What am I doing wrong?