Netatalk + SUSE 9.1 + MacOS X - can't share directory

Hi everyone.

I have linux box with SuSE 9.1 linux, with netatalk installed.
Until now, it works great.

Originally i have four shared direcories:
~ (home)
/data1 "big1"
/data2 "big2"
/data1/post "dropbox"

But aboute 2 weeks ago some problems start appears:
rapidly disconections of clients,
problems with loging (colorfull circle after password enter).

To resolve this problem i have to unshare one shared directories
(big2)
I have mounted it inside another shared directory, (/data1/big2) and
it works good for a week.
Bou now, works only HOME directory.
(I can also mount all other directories, but not /data1 or /data2...)
I have set permissions in this directories to:
owner: read&write
group: read&write
others: read&write

User: nobody
group: nobody

I have also deleted all mac files like ".AppleDouble" and other
similar files,
but it did not help...

P.S.
problem starts probably when I set one login and password to all 5
users.
(before there was five diferent logins and passowrds...)

THANKS for any help...