Hello. I can't see an error with this as it is working for some. It could be the unstable DNS but also our .htaccess rules
To possibly fix this:
Clean your browser information and cache
Try another browser
Try:
http://coinclaimer.com/register.php (added .php in file end)
If it doesn't work please send me a screenshot how it looks when you click register
/Oliver Weitman, developer on coinclaimer.com