According to the Tiger Meet site and their Twitter acount, they are gioing to set up something new in the next couple of days.
Apparantly, the Joomla method didn't work as expected.
"We are at the moment taking down the spottersday2014 website, to restart the server. A Solution is being worked at to restart the ticket sales ASAP, but this will probably not be within the next days.
Once we have more news, we will post it on our Website (once back on-line) and social pages
Nobody was able to complete their ticket purchase so It will be a clean start for all.
Using a professional ticket company is simply not an option as this will raise the price significantly."