(Datum Feature symbol) Set datum tag, Gets Created at wrong Location in Creo 5.0.1.0

Hello All,

I am trying to create a Datum Feature symbol (Set datum tag) in Creo, using toolkit API's.

using the following Code:

ProView proView;
ProViewRetrieve(curMdl,L"Front", &proView);
ProAnnotationPlane annotation_plane;
ProAnnotationplaneFromViewCreate((ProSolid)curMdl, proView, &annotation_plane);

wchar_t *label = L"AA";
ProSetDatumTag r_dfs;
ProMdlSetdatumtagCreate(curMdl, proSelection, &annotation_plane, label, &r_dfs);

I have Set the Attachement Point in my Attachment Object (proSelection)

as: ProSelectionPoint3dSet(attachPoint3, &proSelection);

But Still, The SetDatumTag gets Created at Different location from the point I have Specified.

Can anyone tell me what is wrong here & how to create SetDatumTag at specified location??