Problem with SIDN and NL domain names

[webcanada]

Sidn.nl, the Netherlands Registry, is saying there is a problem with the way that Plesk has set up the default DNS/zone settings, and I'm hoping someone can help me adjust the settings, so that we can host this domain (mydomain.nl). They are refusing to change the nameservers to ours until these changes are addressed.

I've just added this as a domain into Plesk 8.0.1 with the default settings.

Any ideas would be much appreciated!!

Thanks.

** Summary: REJECTED mydomain.nl.

Some problems need to be fixed:
- In total, 4 configuration errors where found.

** Full check report:

* primary name server "ns3.webcanada.com."
Error: specified name server is not listed as NS record.
Error: specified name server is not listed as NS record.
Warning: "localhost.mydomain.nl." not defined.

mydomain.nl. 86400 IN SOA ns.mydomain.nl.
wc.webcanada.com.
(1164649090 3H 1H 7D 3H)
Error: the MNAME in SOA says "ns.mydomain.nl." is the primary name
server.
Warning: refresh of 3H in SOA is quite short, better at least 4H.
Hint: serial in SOA often formatted as YYYYMMDDnn.

mydomain.nl. 86400 IN NS ns.mydomain.nl.
Warning: hidden name server "ns.mydomain.nl." never used for first
contact.

* secondary name server "ns.mydomain.nl." [HIDDEN]
Error: name server and "ns3.webcanada.com." resolve both into
64.41.72.67

* secondary name server "ns4.webcanada.com."
Info: name server looks correctly configured.