FTP Down after update

[Biese1983]

After the update of Plesk 8.6 on Plesk 9.0.0 of the FTP server is down.

Error message:
- warning: handling possibly truncated configuration data at line 65 of '/etc/proftpd.conf'
xxxxserver.de - fatal: Socket operation on non-socket


Plesk-Version 9.0.0
Betriebssystem Linux 2.6.18-6-686 Debian
CPU GenuineIntel, Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz