I bought Final Fantasy XI Online for PC (at a GameStop), so it is going to give me 30 days of free gameplay. When I enter my credit card information, will it automatically bill me for the next month or will it wait till the 30 days are up, then bill me for the next month?

I filled out all the information correctly (I believe) when signing up for a PlayOnline account for Final Fantasy XI Online. However, when I finished everything, it gave me an error message (I keep trying, but it keeps giving the same error message, which I will post a screenshot of below). Could the server actually be too busy, or is it because I left the program running for quite a while before filling it all out? Has anyone else here experienced this problem? And if so, how did you fix it? Here is the screenshot:

Heya, The Error your getting happens from time to time and I'm going to guess you are a NA Player. North American. North American Playonline Inc. and all of the tied in billing services are usually total crap. The simple solution is to check all the information being entered corrected. The next thing you need to do is make sure the card you are using is setup with the Verisign(Or your cards equivilent.(sp)) I know it sounds a little over the top but the reason you're card is being declined is more than likely because the Info is wrong or the card isn't setup through the Verisign system.

In Answer to your first question your 30 days will be done first. If I remember how SE's 30 days work its more or less from now until the end of the month (Unless you start it on a day closer to the end of the month in which case it will carry over) Billing is done on a monthly basis sometime between the 1st and the 4th of the month. You're card will not be charged until the trail period is ended. You can also cancel before then and you'll still be active until your free trial has ended.
I know this all sounds kinda confusing I'm running off memory from when I first played in 2004. Good luck and I hope it works out.