Enc28j60 can't connect to server occasionally

[nihanarslan]

Hello!

I am trying to get temperature and humidity datas and send them to server every two minutes.
Actually I tried it at home yesterday and everything was looking allright for about two hours. But when I tried it at company today it did not work good. When I couldn't send data I add a code to reset it and try again. But it takes too much time. The two minute time becoming around 3-5 minutes. what could be reason and what should I do to fix it.

Note: I can ping it. It seems there is no ethernet connection problem..

Any help would be appreciated! ^^