I am having problem with my ethernet settings in rhel5.5 , I dont know anything where to start.
when i run command :setup and then got to 'network configuration' and then go to 'edit devices' where i found nothing .....
i checked 'lsmod', here is results:
Module Size Used by
mii 38849 0
autofs4 63049 3
hidp 83521 2
rfcomm 104681 0
l2cap 89281 10 hidp,rfcomm
bluetooth 118853 5 hidp,rfcomm,l2cap
lockd 101553 0
sunrpc 199945 2 lockd
vmblock 53956 4
vsock 123360 0
vmmemctl 50344 0
vmhgfs 104288 0
acpiphp 58841 0
loop 48721 0
dm_mirror 54737 0
dm_multipath 56921 0
scsi_dh 42177 1 dm_multipath
video 53197 0
backlight 39873 1 video
sbs 49921 0
power_meter 46925 0
hwmon 36553 1 power_meter
i2c_ec 38593 1 sbs
dell_wmi 37601 0
wmi 41985 1 dell_wmi
button 40545 0
battery 43849 0
asus_acpi 50917 0
acpi_memhotplug 40261 0
ac 38729 0
ipv6 435361 14
xfrm_nalgo 43333 1 ipv6
crypto_api 42945 1 xfrm_nalgo
lp 47121 0
floppy 95465 0
sg 70377 0
i2c_piix4 43725 0
i2c_core 56641 2 i2c_ec,i2c_piix4
pcspkr 36289 0
snd_ens1371 61665 1
gameport 49745 1 snd_ens1371
snd_rawmidi 59713 1 snd_ens1371
snd_ac97_codec 143257 1 snd_ens1371
ac97_bus 35649 1 snd_ac97_codec
vmci 75528 1 vsock
snd_seq_dummy 37061 0
snd_seq_oss 65472 0
snd_seq_midi_event 41025 1 snd_seq_oss
snd_seq 87777 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 41557 4 snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 77377 0
snd_mixer_oss 49985 1 snd_pcm_oss
snd_pcm 116681 3 snd_ens1371,snd_ac97_codec,snd_pcm_oss
snd_timer 57161 2 snd_seq,snd_pcm
snd 100073 12 snd_ens1371,snd_rawmidi,snd_ac97_codec,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss, snd_pcm,snd_timer
soundcore 41825 1 snd
snd_page_alloc 44113 1 snd_pcm
e1000 161365 0
serio_raw 40517 0
shpchp 70893 0
ide_cd 73825 0
parport_pc 62313 1
cdrom 68713 1 ide_cd
parport 73165 2 lp,parport_pc
pvscsi 52388 0
vmxnet3 72196 0
vmxnet 57476 0
dm_raid45 99657 0
dm_message 36289 1 dm_raid45
dm_region_hash 46145 1 dm_raid45
dm_log 44993 3 dm_mirror,dm_raid45,dm_region_hash
dm_mod 101649 4 dm_mirror,dm_multipath,dm_raid45,dm_log
dm_mem_cache 38977 1 dm_raid45
ata_piix 56901 0
libata 209489 1 ata_piix
mptspi 54353 3
mptscsih 69441 1 mptspi
mptbase 121349 2 mptspi,mptscsih
scsi_transport_spi 59841 1 mptspi
sd_mod 56513 4
scsi_mod 196953 8 scsi_dh,sg,pvscsi,libata,mptspi,mptscsih,scsi_transport_spi,sd_mod
ext3 168913 2
jbd 94769 1 ext3
uhci_hcd 57433 0
ohci_hcd 56309 0
ehci_hcd 66125 0

Can anyone tell me what i need to do ....
thnx...

Spell your words out. And it might help if you told us what hardware you're using. We see the e1000 module loaded, which hints at that device, but we can't know for sure.

And since you're using RHEL5, you can call RedHat for support, since you're paying them for it with your RHEL subscription.