Rendering the spreadsheet

Hi, I'm having problems getting the TIWCGJQSpreadSheet component to render unless it is currently shown.
I call IWCGJQSpreadSheet->ResetJSonProps(); IWCGJQSpreadSheet->Import(filename); IWCGJQSpreadSheet->AjaxReRender();
If the spreadsheet component is shown in the browser, the spreadsheet changes correctly. If another form is in focus, then the default spreadsheet (cols A-J, rows 1-25) is shown when I later navigate to the spreadsheet. If I'm on the same form, but the spreadsheet is on a tab that is not in focus, then I get a blank spreadsheet with no cells.
Is there something I need to do to ensure that the spreadsheet is updated even if it is not currently shown?
Thanks in advance.
Richard
I call IWCGJQSpreadSheet->ResetJSonProps(); IWCGJQSpreadSheet->Import(filename); IWCGJQSpreadSheet->AjaxReRender();
If the spreadsheet component is shown in the browser, the spreadsheet changes correctly. If another form is in focus, then the default spreadsheet (cols A-J, rows 1-25) is shown when I later navigate to the spreadsheet. If I'm on the same form, but the spreadsheet is on a tab that is not in focus, then I get a blank spreadsheet with no cells.
Is there something I need to do to ensure that the spreadsheet is updated even if it is not currently shown?
Thanks in advance.
Richard