I need serious help with my internet connection?

[neoprince226]

I have windows xp pro
a regular verizon dsl modem no router or nothing
i keep getting a limited or no connectivity connection i am able to connect to the internet and browse the web but my programs are unable to detect a internet connection like my p2p and ringtone programs and some others i have scanned my comp and no viruses came up a fwe adware but got rid of them multiple scans with different programs to make sure i got them all i have tried ipconfig/release and it worked but ipconfig/renew wont work and its really irritating me my settings are set to automatically detect dns and ip adress can anyone please help me with this problem