[otrs] Tickets created with 'compose email' do not appear in customer frontend

Hi, When I create a new ticket with 'compose email' (otrs1.2beta3), I select a CustomerUser address in the To: field (the CustomerID gets filled too). The ticket is created, the customer receives the e-mail, but the ticket does not appear in the customer interface. I have checked the correct customerid is selected : when I make a search by CustomerID in agent frontend, the ticket appears, as well as other tickets. Thanks, Brice