What I'm doing wrong? Ripped tracks won't play on Ipod

Has anyone had any experience copying tracks ripped with Grip onto an 
Ipod Shuffle?  I am using gtkpod 0.99-2 on an RHEL-4.2 system.  As far 
as I can tell, all the filesystem-related stuff is working fine.  gtkpod 
copies, deletes, synchs without problem to the IPod.  The Ipod is 
instantly recognized by the system.  Looking at the directories on the 
Ipod filesystem outside of gtkpod shows me that gtkpod is indeed copying 
the tracks to the ipod.

Yet none of the songs I copy to the Ipod plays.  The only songs that 
play are the ones that I added to the ipod previously, on a PC with ITunes.

Nobody on any of the gtkpod-related lists seems to have any answers for 
me or has experienced this before.  So I am beginning to think that 
maybe there is something to do with my ripping that is incorrect.

I chose the options of not converting to lowercase and not replacing 
spaces with underscores?  Could these have something to do with it?

I am attaching my relevant .gripxxx files.  Maybe someone knowledgeable 
can tell me what I've done wrong here.  I am using the lame encoder.  
None of the other mp3 encoders appear to exist on my system.

Thanks

.grip:

GRIP 2
grip_version 3.2.0
cd_device /dev/cdrom
force_scsi
ripexename /usr/bin/cdparanoia
ripcmdline -d %c %t:[.%s]-%t:[.%e] %w
wav_filter_cmd
disc_filter_cmd
mp3exename /usr/bin/oggenc
mp3cmdline -o %m -a %a -l %d -t %n -N %t -G %G -d %y -q 4 %w
dbserver freedb.freedb.org
ripfileformat ~/ogg/%A/%d/%n.wav
mp3fileformat ~/mp3/%A/%d/%n.%x
mp3extension mp3
m3ufileformat ~/mp3/%A-%d.m3u
delete_wavs 1
add_m3u 1
rel_m3u 1
add_to_db 0
use_proxy 0
proxy_name
proxy_port 8000
proxy_user
proxy_pswd
cdupdate
user_email scohen-bi+AKbBUZKY6gyzm1THtWbp2dZbC/[email protected]
ripnice 0
mp3nice 0
mp3_filter_cmd
doid3 0
doid3v2 1
tag_mp3_only 1
id3_comment Created by Grip
max_wavs 99
auto_rip 0
eject_after_rip 1
eject_delay 0
delayed_encoding 0
delay_before_rip 0
stop_between_tracks 0
beep_after_rip 1
faulty_eject 0
poll_drive 1
poll_interval 1
use_proxy_env 0
db_cgi ~cddb/cddb.cgi
cddb_submit_email [email protected]
discdb_encoding UTF-8
id3_encoding UTF-8
id3v2_encoding UTF-8
db_use_freedb 1
dbserver2
db2_cgi ~cddb/cddb.cgi
no_interrupt 0
stop_first 0
play_first 1
play_on_insert 0
automatic_cddb 1
automatic_reshuffle 1
no_lower_case 1
no_underscore 1
allow_high_bits 0
allow_these_chars
num_cpu 1
kbits_per_sec 128
selected_encoder 1
selected_ripper 0
play_mode 0
playloop 1
win_width 400
win_height 450
win_height_edit 600
win_width_min 200
win_height_min 80
vol_vis 0
track_edit_vis 0
track_prog_vis 0
volume 255
disable_paranoia 0
disable_extra_paranoia 0
disable_scratch_detect 0
disable_scratch_repair 0
calc_gain 0

.grip-lame
GRIP 2
exe /usr/bin/oggenc
cmdline -o %m -a %a -l %d -t %n -N %t -G %G -d %y -q 4 %w
extension mp3





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