I travel to Mexico from IAH on Continental Express frequently, and today for the first time I couldn't check in on line. When I clicked the "Check In On Line Button", I got a message that I could change my seat assignment but would have to go to a Kiosk at the airport to actually check in. I did buy the ticket today (same day I'm trying to check in for my departure early tomorrow morning), did speak with an agent to buy the ticket, and did charge to a different credit card # versus what I usually use.

Is this a new Continental Policy, that you can't check in on line for flights to Mexico, or something else? Thanks