Unable to obtain socket and address

[Salvatore]

Hi, I have a problem with qpopper 4.0.9 on Fedora Core 6, when:
/etc/rc.d/init.d/popper start
Jul  2 13:18:33 localhost popper[2621]: Unable to obtain socket and address 
of client: Socket operation on non-socket (88)

..I have used parameter:

#./configure --enable-standalone --without pam

Thanks.

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Salvatore.