The Parcel Status Lookup page, on occasion, gets stuck in an infinite loop. When it is in this state, the page does not respond. In order to minimize the down-time, the program restarts itself every 60 minutes. If you experience this problem, then please wait a little bit and then try again.
The problem often lies in your Temporary Internet files or your web browser's Cache. Sometimes the files become corrupted, but your browser is not aware of that, therefore rendering incomplete or non-functional pages. The solution is to delete your Temporary Internet Files or clear your browser's cache.
For Internet Explorer, the procedure is as follows.