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 ptr.0012.0000.0000.0000.017b.000a.4000.2a03.static.yourvserver.net is not the root of its zone.
Instead, try zone transfer on yourvserver.net .
Instead, try zone transfer on yourvserver.net .