oggdec produces wavs with only zeroes (no audible sound) on 64 bit os

When trying to decode an ogg file to wav, a wav file is produced but there is no sound (file consists of zeroes).

----> transcript <---------------------------------------------------

oggdec -o Horses.wav Horses.ogg oggdec from vorbis-tools 1.1.1.svn20070412 Decoding "Horses.ogg" to "Horses.wav" [100.0%] hexdump Horses.wav 0000000 4952 4646 5004 03de 4157 4556 6d66 2074 0000010 0010 0000 0001 0002 ac44 0000 b110 0002 0000020 0004 0010 6164 6174 4fe0 03de 0000 0000 0000030 0000 0000 0000 0000 0000 0000 0000 0000

3de5000 0000 0000 0000 0000 0000 0000 3de500c ----> transcript <---------------------------------------------------

should (can/may) I attach input file? this problem also occurred on my previous kernel (2.6.22.4-65.fc7).

OS: fedora 7 (64_bit) uname: Linux host.domain 2.6.22.5-76.fc7 #1 (closed) SMP Thu Aug 30 13:08:59 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux rpm: vorbis-tools-1.1.1.svn20070412-2.fc7