I installed ubuntu 9.10 day before yesterday.eing a newbie i am used to the connection settings in 8.04LTS.In karmic when i connect my modem,the network manager shows it.But when i connect to auto eth0,it doesnt get activated.And i cant connect DSL without that being activated.Here are my configurations

AMD athlon 64bit

Modem : SmartAX MT882 and connection is BSNL

I would appreciate if someone can give a detailed guide to conguire the modem or connection using usb