Using Excel Function Forecast In Access?

I am trying to use the Excel worksheet function "Forecast" to calculate from existing data in my database. I have successfully gotten the data points into arrays, but when I try to call the forecast function I keep getting the following error: "Unable to get the Forecast property of the WorksheetFunction class". I have imported the object library. This is on a company computer and I do not have write privileges to the C: drive. The database resides on a network drive.

Am I facing some sort of security issue?

Public Function xlForeCast() As Double
Dim MyHeight As Variant 'Will be the point for which you are forecasting, in this case height
Dim MyRange() As Variant 'Will be the independent element of the forecast function
Dim MyRange1() As Variant 'Will be the dependent element of the forecast function
Dim MyArray() As Variant 'Temp array to hold the query result set values before being split into the two preceding arrays
Dim db As DAO.Database

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