Tried to book a train from Paris to Reims last night via tgv-europe.com and after submitting my CC info, it went through all the hoops of verification screens and then spit out a rejection. I'm using a British Airways Chase Visa. I called Chase this morning and they show no rejected transactions on their end and I was able to book train tickets the same night on the Belgium railway site.
I tried my Capital One Visa as well and it was also rejected. Maybe there was a hickup last night on their servers. I'm going to try again tonight since I know a rejected card on their site requires a 24 weight before they will accept it. Any suggestions of what I might do to get tickets successfully?