row highlight code doesn't work in Shared WorkBook

Dear All,
Following code is to highlight the Row in the given range when a cell is selected.
This codes works perfectly alright until the time the workbook is Shared.
"Application defined or Object defined error" is shown when the workbook is Shared

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Please help, what is wrong.

Regards
Krishnamoorthy S

One of the (many) constraints of a shared workbook is that you can't change sheet protection so you are, effectively, working with a protected worksheet.

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