If you have pressed and held in the little button on the back you have effectively performed a (factory) hard reset.
There will now be no network key (encryption) and you will have to reconfigure the modem / routers security settings as it will now be behaving like a free WiFi hot spot.
You will need to check the wireless settings of the router . Is there any computer connected to the router with the Ethernet cable? If not then connect 1 computer to the router and open the router set up page. Once you open the router set up page, you will be able to find the wireless network key. Use that password to connect to the wireless network
Click Here for step by step Instructions on how to find the network key
Answers & Comments
If you have pressed and held in the little button on the back you have effectively performed a (factory) hard reset.
There will now be no network key (encryption) and you will have to reconfigure the modem / routers security settings as it will now be behaving like a free WiFi hot spot.
You will need to check the wireless settings of the router .
Is there any computer connected to the router with the Ethernet cable?
If not then connect 1 computer to the router and open the router set up page. Once you open the router set up page, you will be able to find the wireless network key.
Use that password to connect to the wireless network
Click Here for step by step Instructions on how to find the network key