[otrs] Error: Need TicketID!

[Davide Pluda]

Hello.

I'm new in otrs, i use it few months back. It was works fine. Today it
doesn't kork, when i try to create a ticket from customer it give this
error:

ERROR: OTRS-CGI-10 Perl: 5.8.8 OS: linux Time: Tue Aug 22 15:44:04 2006

Message: Need TicketID!

Traceback (3342):
   Module: Kernel::System::Ticket::Article::ArticleCreate (v1.94) Line: 84
   Module: Kernel::Modules::CustomerTicketMessage::Run (v1.3) Line: 311
   Module: Kernel::System::Web::InterfaceCustomer::Run (v1.6) Line: 677
   Module: /opt/otrs/bin/cgi-bin/customer.pl (v1.36) Line: 47

I read an other mesage similar to mine, but solution proposed "Just
make some free space available in /opt  and you will get thru the
problem" don't work...

I can create ticket from User.

Can you help me?
Please.