ComboBox not working when sheet is protected

Hello again, i have a problem with ComboBox, Column B (Item Description) has data validation that when double clicked the ComboBox will activate. (The purpose of this is i want my cell to have suggestions and auto complete), The problem is i need my sheet to be protected (this is a shared workbook via network by the way), and when sheet is protected the ComboBox don't activate. I tried to unchecked the Linkedcell(Column B) and the .Locked to true but none of them works,

Hope someone help me with this.
here's my sample file.

It doesn't work because you're using a before double click event and protecting the workbook stops that happening as you cannot put the cell into edit mode.

You could unprotect just the range the comboboxes are in.

Just out of interest, what is the idea behind using a combobox rather than in cell data validation for the drop down list?

BSB