erm connections problems here ...

Well, I've unplugged cable from the modem and i tried to restart the modem by pushing the on/off button. But none of them really worked. Maybe i have to try again. But now, we don't use the router anymore, only the modem and some splitter (=where you can plug multiple internet cables in). But with that splitter thing too, If we put some internet cables in that thing, those cables get some IP-conflict. I don't know how to solve the IP-conflict between the computer here. Some dude once said we have to use DHCP, for solving the IP-conflict, but how to do it? So back to the main problem here. Yes, the laptop is wireless, but now we only use cable for the internet connection. Because we disconnected the router for the wireless signal.
About that signal, well, my laptop says with an icon in the right-down corner of the screen that it has connection with the internet, so my laptop got the internet signal, so it must be a good signal. But it doesn't really succeed in linking the internet. What i mentioned before was the flashing lights, yes, those lights were on the modem. All lights on the modem are still lit (in green), like the one for 'power', 'DSL' and 'internet'. But just one light keeps flashing (also in green): 'ethernet'. When this flashing light of 'ethernet keeps flashing the internet is somehow disconnected with my laptop. But when the 'ethernet' signal is lit (so not flashing) the internet is connected with my laptop. The brand of my laptop is Chilli Green with the windows functional system on it. I hope you know more about it ... cause man is driving me crazy here sigh.... any help that came i appreciate it alot ...

 

You need to setup your router for many reasons, FW, NAT, DHCP to name a few. A router is need to to share a connection if you are not allowed multiple IP address. A switch will work but does not do the NAT.

Reset the router to factory settings and start clean. Connect the modem to the WAN/Internet and lan connection to your pc/nb. Use the PC used to setup the account. Enter any login info if required. CLONE your MAC address into the router. This will make the router look like your pc.. Get this working before moving to the wireless. Then Setup WPA(2) Personal AES security using 20+ random generated (all printable chr) string. I use grc.com key generators and copy to notepad. Use copy and paste to enter the strings.