I'm new to bitcoin and am certainly doing something wrong.

I have Bitcoin installed on my Mac and someone is sending me funds via a receiving address I generated but nothing comes in (its been several hours now).  Any idea why?  The bitcoin software has been installed (and running) on my computer for a few days.  I quit and restarted it but that made no difference.

Down at the bottom of the screen it says:

0 connections
1000 blocks
0 transactions

I know the sender DID send it - its only .001 BTC for testing.

What might I be doing wrong?