ConnectionTimeout after reconnect, caching?

Hello community,
I am writing a website parser with htmlparser and I think it's a great 
library.
My problem is, the website I'm parsing shows me a captcha after a 
certain number of crawls.
As a workaround I wrote a redial routine to reconnect my router and get 
a new ip.
That is working quite well, but my problem is, that my jvm seems to 
cache DNS.
I read this post http://forum.vis.ethz.ch/showthread.php?t=13457 and 
applied everything which is supposed there,
but still I can't continue parsing after a reconnect and I get a 
ConnectionTimeoutException from htmlparser.
It seems, that there might still be some kind of cache.
Could anybody tell me, how I can get the new instance of Parser to 
connect after a reconnect.

Thank you.
Hans.

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