If I want to register a new user, no matter wahat I enter or if I turn the verification to a lower level, I am getting the following message:

Warning: Compilation failed: range out of order in character class at offset 14 in c:\apache\htdocs\xoo\html\register.php on line 74
Username: 12345
Email: 123@123.de
Time Zone: GMT +0

the line 74 is....

}
if (!isset($uname) || $uname == '' || preg_match("/[^".preg_quote($restriction)."]/",$uname)) {
$stop .= _US_INVALIDNICKNAME."
";
}

Thank you.
Nopse

line 74 checks if the string $uname is set - but 12345 is an integer.

Write a username including letters (guessing - but think I am right )