Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain amontpellier-651-1-379-236.w81-251.abo.wanadoo.fr is not the root of its zone.
Instead, try zone transfer on w81-251.abo.wanadoo.fr .
Instead, try zone transfer on w81-251.abo.wanadoo.fr .