I have a problem with my Wi-Fi Hub: P?

Ok well when i got back home from holiday with my family, we installed security cameras that would receive via a wireless network. Well by then, my Wi-Fi router (still fast) wouldnt connect to other devices within more than 2 feet, the cameras are still capturing… Anyway i can't get a way for my Wi-Fi hub to connect, it has a full signal but neither my iphone or Windows 7 would connect to it. (the message says, "Unable to Connect to <SSID> so i troubleshoot problems and it says Windows can't find a solution.) Now iim connected because i'm using a LAN cable: P is there anyway i could stop this? I'm thinking of contacting the maintenance soon but since its the summer holidays they won't be there until the end of August. I can't keep a Wi-Fi hub with a LAN cable for that long either: L

I would appreciate for help.

Check the DHCP pool of addresses on the router, if these are IP cameras they may be taking up All the free addresses. In this case extend the range of addresses. Probably not the problem as your wired connection works. Also try rebooting the router, unplug the power and wait a few seconds, then plug back in.

Wi-Fi hub is always creating a domain collision. Try to assign the cameras static IP address and then see if the other devices acquire an IP address. If this do not work, reset your main gateway or router. Make sure you do not have any configuration, because resetting the main gateway would erase all configuration that has been made. Reset means put the device to its default state.