Router Problem

Hi ! Would really appreciate it if some kind soul out there could help me with a small problem.

I initially had a wireless connection setup (done by a friend more knowledgeable than me) at my place with a DSL modem & Wireless Router (Linksys WRT54G) and it was running perfectly well.However I recently shifted to a new house and tried to setup the wireless connection - but I'm unable to do so.The only thing thats changed is the DSL Modem (Same make/model/ISP but different location and therefore different settings like username/password).I checked the Router's settings and found it set to "DHCP" mode at the 'basic settings' tab.I re-checked all the physical connections (modem to Router & Router to PC) and they're fine.

So currently I can connect to the Router wirelessly (it shows up among the wireless connections) but after connecting to the Router I'm unable to connect to the internet.As of now I'm accessing the internet by being directly connected to the DSL modem by an ethernet cable.

Additionally - one peculiarity is that I can now access the Router through the web browser - whereas earlier (when the connection was working) if I typed 192.168.1.1 in the browser I could not access either Router or Modem.

I understand the information I have given is a bit vague on account of being a rookie but would appreciate any help - I can certainly provide more info if it would help clarify the problem.

Thanks in advance !!

The very first step I would do is unplug both your DSL and wireless router from electricity. Now, plug in the DSL modem, and let it power up. The only thing that should be connected to the DSL modem is an ethernet cable to the wifi router. Now, once the modem has all it's happy little lights on, plug in your wireless router. Allow it time to boot, and try to connect wirelessly. (or through an ethernet port on it, your choice.)
Modems typically assign their IP's to the first device plugged into them, and it's based on mac address. If you had plugged a pc into your modem before, then just plugged the router in instead, it wouldn't have granted the wifi router an address.

Thanks heckufaguy.I discovered the problem was overlapping IP Address ranges for the router and the modem.I just changed it and currently everythings fine.Thanks a ton.

hey , i can not open a new threat , but i've been really needing help

today , i've bought a ZTE ZXDSL 531B modem, i did connect it by ethernet...but there's something wrong about my wireless connection... my laptop can connect it by ethernet , but it can not connect by wifi.

how can that happen , there's nothing in the manual, and i've been trying to do it for hours.still nothing. pls help me .

my e-mail : eray367@gmail.com