I'm using MacBook Pro and my wireless connection has been disconnecting since morning at my friend's house while using his wireless modem. I connect wireless modem without any issue, but after a while it disconnects and it does not connect automaticly again. I've changed my DNS, but it still disconnects. My mobile phone also connects the same wireless modem, but my mobile phone does not disconnect. Only my MacBook Pro disconnects.

What should I do?