Socket blocked for about 60 seconds


I have build a small web-server ( just out of one of the examples on the internet ) on a NP2. It works fine but if I send a POST message the NP2 does not accept any new POST messages untill about 50-60 seconds are expired. The sending application get’s a time out error or web-site not found when trying to reach the NP2. After this ‘time-out’ is expired the NP2 works perfect again. It seems the socket is blocked for some time and then released…

How can I solve this ?