Powerpoint 2003 SP3 is not opening links to excel graphs, giving application server error

I have a powerpoint slide that was developed some time ago that has embeded links to excel graphs located on a different network. For some reason, it recently started failing to update the links. Has anyone seen this before. I googled and tried repairing the graph.exe application but it did not help.
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What has changed since it last worked?  Has network been updated?
jffisherAuthor Commented:
Not sure, could be related to security updates in Excel or office.
Can you physically locate the files that have been linked on your PC using Explorer?
If you cannot do this, the links will not work.
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Shanmuga SundaramDirector of Software EngineeringCommented:
Please check this

jffisherAuthor Commented:
Here is the error I get

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