Modules & VBA :: Passing Date Strings Into Access Chart

I would like the user to be able to select the months he wishes in case they want to look at calender year, financial year or just a custom group of months. If I use the wizard and pick dates say the start and end of the year I get the following code in the row source of the chart control:

Code:
SELECT (Format([DatePaid],"MMM 'YY")),Sum([TotalPaid]) AS [SumOfTotalPaid] FROM [Q_AllCust_Gross] WHERE ([DatePaid] BETWEEN #01/01/12# AND #31/12/13#) GROUP BY (Year([DatePaid])*12 + Month([DatePaid])-1),(Format([DatePaid],"MMM 'YY"));

So I decided all I needed to do was replace the dates in the above code with my own global varible which i would pass custom dates into via a form. Which I called getds() and getde()

Code:
SELECT (Format([DatePaid],"MMM 'YY")),Sum([TotalPaid]) AS [SumOfTotalPaid] FROM [Q_AllCust_Gross] WHERE ([DatePaid] BETWEEN >=#getds()# And <=#getde()# ) GROUP BY (Year([DatePaid])*12 + Month([DatePaid])-1),(Format([DatePaid],"MMM 'YY"));