"Title block edit" is missing

Hi all

All of a sudden I cannot edit my title block.

I only want to resize the rectangle laid over the title block area

I get no option to select  " edit title block"

I have followed this  "Open a drawing sheet, right-click the sheet format in the FeatureManager design tree, and select Define Title Block.

If you have already defined the title block, select Edit Title Block."

I managed to drag the "title block Table" button on to Solidworks but it is greyed out all the time.

Has anybody come across any setting that could be disabling this option?

A small problem but it is driving me nuts and I have already wasted half a day on it.

Thanks

Jason

SolidworksDrawings And Detailing