tracking package???

I shipped a package to the US a few weeks ago from the Czech post office. THey told me it would take 6 days or 30 days....I paid for the 6 days...and obviously it isn't there yet. Is there any way I can find out what happened to it? Could something bad have happened to it if I shipped a couple pocket knives from Germany to my nephews? I did not declare them or everything on the box. ANy experience with this? What can I do? Thanks for your help.

13:21:26 31.12.2010 HunterB