Regular Expressions

Hello, I'm trying to use a regular expression for not matching sms
starting with one, two or four.

For what I have read the POSIX regular expression for this should be:
^(?!one|two|four)

However kannel fails to compile it with: regex compilation
`^(?!one|two|four)' failed: Invalid preceding regular expression.

Is there a way to make an inverse regular expression match? thing is
that I have 3 services with keyword one, two and four and I need
another one to match everything else (but one, two and four of
course).

Thanks