Access worksheet with the same name as cell value

Hi all

I am trying to use the following code but am getting an error and cannot see where I am going wrong:

Sub Fill_1()
    Range("AE87").Copy
    Workbooks("Purchase Orders - New.xls.xlsx").Activate
    Worksheets("Autofill Information").Select
    Range("C3").PasteSpecial xlPasteValuesAndNumberFormats
    Worksheets(Range("C3").Value).Activate
    MsgBox ("Fill 1 continues")
End Sub

The code copies a cell and activates a new workbook and worksheet and drops the value onto said sheet (in this case Autofill Information). This works up to this point. I then need to activate a sheet with the same name as the value of cell C3 (i.e. the copied value). I cannot see why my code won't do it, any takers???

Thanks
Ash