samba - Mar 2002 - Can't change directory to /tmp (Permission denied)

Samba was running a few days ago. Yesterday I got an error while I was trying to
connect:

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C:\>net view \\10.10.10.197
The server is not configured for transactions.

More help is available by typing NET HELPMSG 2141.
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Log /var/log/samba/samba.log.ambox shows the following error:

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[2002/03/06 09:41:14, 0] smbd/service.c:make_connection(565)
ambox (10.10.10.12) Can't change directory to /tmp (Permission denied)
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I checked permissions of /tmp, which seems to be good:

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root:/usr/src# ls -dl /tmp
drwxrwxrwt    2 root     root         4096 Mar  5 20:41 /tmp
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Did anybody face the same problem in the past?


BTW: OS is Linux From Scratch V3.1 ( Kernel 2.4.16 ) and Samba 2.2.2

Thanks for any advice

Rolf