new d link router

we just got a D link DIR 615 and we have a persona modem we just switched from a bell modem/router and it always worked on my computer but now we set up the new router and my computers internet isint working. my parents computer has inter via wire connect and my ipod and sisters laptop via wirless work just my computer wont connect however it says its connected and the wire light flashes and the router flashes for the slot im in and we tried the wire on my parents computer and it worked so i dont know why my computer wont work can someone please help i dont want to go all break on my ipod

Wolf