>we have compiled an application
>it runs the label in our development environment and when we install a test runtime version on our computer
>it does not work on the client machine, we use LABEL .... PROMPT and the printer dialogue does not come up.
>on the clients machine our printer setup which brings up the PROMPT printer dialogue does work
>any ideas?

Try using the REPORT command instead of LABEL. Just be sure to specify your complete label name including the .LBX.