Contact your host and have them look at the server logs
Also Have you tried the usual repairs
1) In Windows Explorer Find and delete all FP Temp Files
2) In Windows Explorer Find and delete all hidden *.web files
3) In Windows Explorer Find and delete the file CMDUI.PRF
4) Disable or Uninstall any FP Addins
5) Run a Repair / Reinstall on FP & IE
6) Install all Service Packs for your OS, IE, and MS Office
| Frontpage stops responding when I up load my web pages. I
| get an Error message of 505