In need Of help with a Westell 2200 Modem and a new Router

Okay, here's the situation:
I am trying to hook up a Linksys wireless Router.
When I try to access the Modem to activate "bridge mode," I am unable to. Apparently back 3-4 years ago, my mother thought it would be a good, safe idea to change the username and password of the router. It's real safe considering she forgot what she changed it to.
My question is:
Is there any way/chance I can get into the modem some other way?
Thanks to anyone who can help in any way!  

#1 When you tried to log-in to the router:
a) Did you get a log-in screen?
b) Did you try physically by wire connecting your computer to the router?
#2 Did you try the reset method?
With most network equipment, the reset method is..
Press and hold the reset button/switch while turning off and back on the power to the router.
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