About internet problem

Is it an internal modem or an external modem? Have you got software for your modem for the operating system that runs on your PC?

it is an internal modem. SO what should i do now?

I'm going to assume that you don't have it installed in your PC yet. You'll have to remove the cover or the side cover, depending on if it's a tower or desktop type case. You have to remove one of the covers on the back next to a PCI slot and plug the modem into the slot. Put the covers back on and power up the PC. It will detect the new hardware. If it's a common modem then your OS may already have included software for it. Otherwise, you'll have to put in a disk. Once the installation is finished, you'll probably have to restart your PC. Once that's done, then your modem is installed. I'm assuming it's a dial-up modem, which means you'll need access to a phone line, and a suitable cable. You'll need an account with an internet service provider (ISP). Many ISP's will provide you with a disc which will take care of the connection for you. Otherwise you'll need a phone number, and if it's a Windows pc, you can run the network setup wizard which will take you through the steps for setting up your connection.