VBA Code for IF Statement returns Run-Time Error 1004

For some reason I can't get this to work. Any Ideas/Suggestions? I'm VERY new with VBA programming

  If IsEmpty(wsDest.Range(UserExternalID)) Then
            wsDest.Range(UserExternalID).Value = iCell.Offset(0, 1).Value
            wsDest.Range(UserExternalID).Offset(0, -1).Value = iCell.Offset(0, 2).Value
            wsDest.Range(UserExternalID).Offset(0, 1).Value = iCell.Offset(0, 4).Value
            wsDest.Range(UserExternalID).Offset(0, 2).Value = iCell.Offset(0, 5).Value
        Else
            wsDest.Range(UserExternalID).Offset(-1, 0).End(x1down).Offset(1, 0).Value = iCell.Offset(0, 1).Value
            wsDest.Range(UserExternalID).Offset(-1, 0).End(x1down).Offset(1, 0).Value = iCell.Offset(0, 2).Value
            wsDest.Range(UserExternalID).Offset(-1, 0).End(x1down).Offset(1, 0).Value = iCell.Offset(0, 4).Value
            wsDest.Range(UserExternalID).Offset(-1, 0).End(x1down).Offset(1, 0).Value = iCell.Offset(0, 5).Value

Any and All Help is appreciated thank You!!