How to find a network harddrive via ethernet

Hi, I have a Maxtor Shared Storage drive which i normally connect to our router at home and is accessed wirelessly over the router however I am trying to connect the hardrive straight to the computer (i.e. external harddrive connected via an ethernet cable to my iMac). However i cannot find it!! I have tried going into finder and pressing go>connect to server>ip address but this won't work!

any ideas guys? cheers