Wireless Internet Connectivity Problems

hi all,
here's the problem.
one day my credit card expired so my ip shut me off. not knowing that it had expired i set my modem to defaults. then i found out the news...

ok. i have a computer (MAIN) connected via cable to a router which is an Alcatel Speedtouch 570. it is a wireless router which is normally connected wirelessly to two other computers. one computer (laptop named MEGATRON) and a desktop named WAZZA. the laptop is using a netgear wireless usb adaptor. the desktop uses a belkin wireless networking card.

previous to my defaulting of the modem everything was working correctly (ADSL, LAN....) now nothing except MAIN works and has internet. i get a limited to no connectivity message on the wirelessly connected machines, which is not a SP2 glitch this instance btw.

at first i researched and i thought it was a DHCP thing but now im not too sure...if anyone has any experience in modem settings esp. speedtouch's and can help me, i will be eternally greatful...I NEED TO GET MY KIDS OFF MY PC!

 

Did you have any security instituted before? Like a WEP key?