Extremely slow samba speed.

Hey.
I have two computers running arch linux, both with a samba server for sharing files between them. I'm experiencing some very weird behaviour. Windows users can easily download files from the server with proper speed, but when I mount the samba share with my laptop it is EXTREMELY slow. It's like 8 hours for 150 MB. My laptop also has a samba server running, and when uploading files to it, it is just as slow. There is nothing wrong with the connection, because when downloading from the internet, both system are able to get speeds at 800 kB/s. What could be wrong here:
Here is my services definitions for the main server:
[global]
server string = Samba server pwrd by Arch
security = SHARE
log file = /var/log/samba/%m.log
max log size = 50
dns proxy = No
[homes]
comment = Home Directories
read only = No
browseable = No
[printers]
comment = All Printers
path = /var/spool/samba
printable = Yes
browseable = No
[winD]
path = /mnt/winD/
guest ok = Yes
[winH]
path = /mnt/winH/
guest ok = Yes
[dev]
path = /home/peter/gamedev/
guest ok = Yes
[upload]
path = /mnt/upload
read only = No
guest ok = Yes
And for the server on the lappie:
[global]
server string = Arch Lappie
security = SHARE
log file = /var/log/samba/%m.log
max log size = 50
dns proxy = No
[homes]
comment = Home Directories
read only = No
browseable = No
[printers]
comment = All Printers
path = /var/spool/samba
printable = Yes
browseable = No
[upload]
path = /mnt/lan/upload
read only = No
guest ok = Yes
I'm also having trouble mounting the 'dev' share. All the other shares mounts just fine, but when trying to mount the dev share i get the following error:
IP: 192.168.0.183
192.168.0.183
Input mount point: /mnt/lan/ARCH/dev
Setting mount command to SMB
smbmount //192.168.0.183/dev /mnt/lan/ARCH/dev -o password=
Mounting //192.168.0.183/dev ...
3480: tree connect failed: ERRDOS - ERRnosuchshare (You specified an invalid share name)
SMB connection failed
Failed to mount
Failed, mounting by netbios
ARCH
Input mount point: /mnt/lan/ARCH/dev
Setting mount command to SMB
smbmount //ARCH/dev /mnt/lan/ARCH/dev -o password=
Mounting //ARCH/dev ...
3481: tree connect failed: ERRDOS - ERRnosuchshare (You specified an invalid share name)
SMB connection failed
Failed to mount

slide_rule wrote:Could you post the output of "smbclient -L <address to ARCH server>" from the laptop? FYI, you don't need the samba server running on the laptop if it's a client, you just need samba installed.
yes, I'm running the samba server on the laptop to share, not to download
Here is the output of the smbclient -L command:
Domain=[WORKGROUP] OS=[Unix] Server=[Samba 3.0.30]
Sharename Type Comment
winD Disk
winH Disk
dev Disk
upload Disk
IPC$ IPC IPC Service (Samba server pwrd by Arch)
Domain=[WORKGROUP] OS=[Unix] Server=[Samba 3.0.30]

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[URL=http://www.speedtest.net/result/1624403580.png[/URL]
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