Problem with Resume feature

For one of my Studio 09 projects the Resume function behaves weirdly. If I resume the presentation I get this:

If I click yes i get the following dialog box:

If I click OK I get a blank presentation screen.

If I click no on the above screen it performs correctly and takes me back to the start.

Here are my template settings:

I'm running this on an LMS with SCORM 1.2

Any clues as to what is happening?  Thanks Lou

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