WP 2.7 - Can View a Specific Page, but Can not Edit - Displays "Error 500 - Internal server error" message

[keddy]

I am using WP 2.7 and am unable to edit a specific page in a category.

I and all visitors can view the page, but when I try to edit, I get this error message:
"Error 500 - Internal server error".

I have not added any thing strange in that problem category page, but accessed it just 3 days ago with out a problem.

The "pages" link in WP has about 7 categories, but the issue is only on 1 page. The rest 6 have no issues.

I don't understand why this is happening as I have not had any issues so far.

Please help as I desperately need to edit that problematic page.

Thanks

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