There are so many spam registrations that sometimes legitimate registrations get rejected. Please try again. And again use a name that isn't something that appears to be a random string of letters and numbers--preferably use a name that reads like a name.
Update: since the application of our new filter, the spam problem has virtually vanished. Therefore, real people, who can easily pass the filter, are free to use whatever Registration name they wish--within the bounds of good taste... ____________ Specfiction