These are NOT direct answers but may be of some help:

• Unless you have a very specific and well-thought-out reason for using cgi-lib.pl, which is largely obsolete and widely deprecated, use CGI::pm >fixing typo/brain spasm: CGI.pm instead.
• Your words and code seem to disagree with each other: I see not 2 tables, but 3: bademails, alerts, and registrations. Am I missing something?
• &Conn_to_DB; Undefined subroutine &main::Conn_to_DB ...
  (As usual, using strict and warn would have let you know about that mistake)

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