VBA setxdata problem

Hello there I am having bit of a problem with my setxdata function I wrote on vba. The problem is I am trying to store objectid of polyline in to different line by first converting that objectid in to string and then store in by 1000 group code via setxdata. But somehow it gives me this error "Invalid argument group code in the type SetxData method". I tried many other codes but my efforst are futile. The code can be seen below.

Public Function setdata(polyid1 As Variant, polyid2 As Variant, akot As Variant, polyid3 As Variant)

Dim datatipi(0 To 3) As Integer
Dim data(0 To 3) As Variant

datatipi(0) = 1000 'arazi profil çizgi id
datatipi(1) = 1000 'arazi plan çizgi id
datatipi(2) = 1000 'arazi profil ilk kotu
datatipi(3) = 1000 'çizilen hattın id'si

data(0) = CStr(polyid1)
data(1) = CStr(polyid2)
data(2) = CStr(akot)
data(3) = CStr(polyid3)
Stop
ActiveDocument.ObjectIdToObject(polyid1).SetXData datatipi, data
ActiveDocument.ObjectIdToObject(polyid2).SetXData datatipi, data
ActiveDocument.ObjectIdToObject(polyid3).SetXData datatipi, data


End Function