Ubuntu Networking :: User Can't Append To Files In Samba Shared Folder

I'm setting up a network between 2 pc's where the one should act like "file server" and a normal pc to surf on internet.called ORLA-DESKTOP and the other pc is called OLGA-DESKTOP a pc connecting to the server and automounting the shared folder to the desktop Both pc's run ubuntu 10.04 Lucid Lynx The shared folder is located on the server in /home/orla/svenson

ORLA-DESKTOP have 2 users "olga" and "orla" in a group called "svenson"
OLGA-DESKTOP have 1 registered user "olga" also in group called "svenson"

users on ORLA-DESKTOP can read/write/append and so on and fully manage everything in the shared folder.But on OLGA-DESKTOP the user can make a file on the pc and then drag'n'drop the file the the shared folder, and can also delete files in the shared folder. but cannot create a file directly into the folder like on ORLA-DESKTOP I have 3 configuration files made. 2 for automounting, Located on OLGA-DESKTOP 1 for samba server configurations located on the server ORLA-DESKTOP

The first one is /etc/fstab

Code:

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).

[code]....

To sum it all up the real problem is that OLGA-DESKTOP can't append to files in the shared folder. but users on the server have no troubles doing it..