Dataone Multiple Connections

Dear friends,

i had opted for 2 dataone broadband connection one for my office and one for my home. And now i can use them both of them at on place by just changing the usename and password. its old so has ip addres of something 59.xxxxxxxxxx

Now i have taen a new connection of dataone in office. it came with a black modem quite different from what i got before which was white and boxy.

Now i cant use this username and password from home. is this because of different range of ip adrees ie: 127.xxxxxxxxxx. is there any way to use this connection at my home

please someone can help me