TOMI - Chapter 1 - Game Currently Unavailable Error

edited July 2012 in Game Support
Hi, I recently downloaded Tales of Monkey Island (Chapters 1 through 5) through Steam. All the Chapters work, except for Chapter 1. When I attempt to run Chapter 1 I get the following error message from Steam: "This game is currently unavailable. Please try again at a later time."

Like all of the other chapters, Steam tells me I've 100% download Chapter 1.

Can anyone help me fix this issue, please?

Thanks,

Colin.
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