OK so I this is a dumb ? but this has never happened to me before. Ok here it is, i downloaded the new RobotC (3.04) onto my new labtop. Now im trying to download my program onto the nxt brain but the window on my computer tells me that there is not a connection and im wondering what to do now.....gezz i feel like a noob.

I have a new labtop
I have downloaded the new driver and robotC
I have window 7

Please be descriptive and links always help