Hi there,
Go to Tools|References. Find the Missing:Microsoft Outlook 14.0 Object Library. Un-tick the checkbox. Scroll until your find the Outlook library with the version of Outlook that is installed on the machine you are using. Tick that one.
If you show us the code you are running, someone will most likely help by showing how to make some changes to the code so that running on different PCs doesn't result in this. In the VBA help, you will want to read about Late Binding vs. Early Binding.
Hope that helps,
Mark