Add worksheets to workbook

[boboles]

I am trying to add a new chart in a new worksheet in a protected workbook, but the "plus sign" to add a new sheet is grayed out, so I can't add the sheet.

Thanks for any help.

[Raza]

I mostly do as bellow:
It is possible to create a new sheet for you chart, if you first select the data range then go to insert chart. Select chart type then In the chart Options window select new worksheet.

[gebobs]

Unprotect the sheet.