Problem with thubnail component

Dear Kirupa people

When I test my flash project (CTRL + Enter) the thumnail component that I purchased from flashkit.com does not show - this also happends with the built in flash video component that loads an flv from the same directory a the project. When I simulate download (CTRL + Enter again) the componenets can be seen?

Anybody shed any light on this?

Many thanks

Joe