Philco,

I am not sure that they are not still grounded..

I just looked again on their website and still cannot book tickets. Service has been unavailable since their last Notice to passengers about being grounded, whichs dates back to July 6.

Here is the notice to passengers link (although in spanish). It also states that in order to help out already booked passengers, you can use AM or MX (for a fee).
http://www.aviacsa.com/espanol/corpo...os_060709.html

Best of luck, I hope all ends up fine for you.