Nokia Asha 501 is one of the phone which doesn't have Nokia PC Suite support. However, you have the possibility to install the Nokia Connectivity Driver provided by Microsoft. This will give you the possibility to access the phone when connected to PC.
Connect the phone and install it then select Modem. After the modem has been installed, go to Network and Settings and create a new connection then Set up a dial connection and choose the Nokia Modem. Type *99# and click Connect. You should be able to use the Internet.