Open Question: Help! my usps tracking code isn't updating!?

I sent it over 3 weeks ago to china with first class international but every time I look at it again it just says: Your item was accepted at 11:30 am on August 21, 2010 in ARCADIA, CA 91006. Information, if available, is updated periodically throughout the day. Please check again later. Can a usps employee help? the tracking number is LC535034405US. I already tried calling them at the right times too but only the IVR answered.