Scratch

Here are some possible reasons and things to try.

1. File too big  (Solution: Click Extras button, choose "compress sounds." Also "Extras >"compress images")

2. Internet connection too slow and times out (Solution: make file smaller, if that doesn't work, try connecting from a different computer or connection or web browser)

3. Wrong username and password. (Solution: Try logging into Scratch website to make sure username and password are correct.)

4. Proxy server getting in the way (Solution: Try an Internet connection that does not go through a proxy server).

5. Website "hiccup" - (Solution: Try again later).

6. Security software (Solution: Try a different computer or different settings on security software.)

If others can post ways they've overcome these or other problems, please let us all know!