Thanks a lot Dstan and Doc Savage!
I purchased the tickets on tuesday and today my ticket are still pending. My flight are on may.
I've both the e-ticket numbers. I can see my travel details with e-ticket numbers also on checkmytrip.com.
But the ticket are still pending on iberia website, so I can't see there my e-ticket numbers. If I click on "ask for a copy of the tickets" the e-mail sended to me has no ticket number and ther's written
"When the charge to your credit card has been confirmed, we will send you a new mail with the information about the tickets issued or, to the contrary, the necessary instructions to complete the purchase successfully."... but orbitz charged my credit card!!

Probably I'll be unable to do online check in with this status, but my nightmare is that on the leaving date they will tell me that I can't fly... what do you think about?

Thanks for your help!