ns change..problems

[powerdomein]

Dear guys,

I have change the DNS IP`s. Now my second nameserver dont work.

I had:
ns1.bulduk.nl - 85.92.134.112
ns2.bulduk.nl - 85.92.134.113

I change to:
ns1.bulduk.nl - 85.92.134.111
ns2.bulduk.nl - 85.92.134.112

See:
http://www.dnsreport.com/tools/dnsreport.ch?domain=powerdomein.nl

Now my second ns2.bulduk.nl dont work en its show still the old IP.. Can someone help me with this problem.

[existenz]

Did you give it time to propagate?

;; ANSWER SECTION:
ns1.bulduk.nl. 14400 IN A 85.92.134.111

;; ANSWER SECTION:
ns2.bulduk.nl. 14400 IN A 85.92.134.112

[powerdomein]

no,
how and where to givev it.