Ole DB for OLAP

I am trying to connect to MDP provider using
OLE DB For OLAP following these steps:
1-i'v got the List of providers..and choose one of them
2-i called ParseDisplayName() ,..the i called BindMoniker() method as written in the code below...
3-When i Call ppIDBInitialize->Initialize(); ..i got Access voilation exception
can any one help me please....
Here is the code:

ULONG chEaten = 0;
hr = pIParseDisplayName->ParseDisplayName(pIBindCtx,rgEnumInfo[i].wszParseName, &chEaten, &pIMoniker);
hr = BindMoniker(pIMoniker, 0, IID_IUnknown,(void**)&ppIDBInitialize);

rgProps[0].dwPropertyID = DBPROP_INIT_LOCATION;
rgProps[0].vValue.vt = VT_BSTR;
rgProps[0].vValue.bstrVal = SysAllocString(L"server");

rgProps[1].dwPropertyID = DBPROP_INIT_DATASOURCE;
rgProps[1].vValue.vt = VT_BSTR;
rgProps[1].vValue.bstrVal = SysAllocString(L"FoodMart 2000");

rgProps[2].dwPropertyID = DBPROP_AUTH_INTEGRATED;
rgProps[2].vValue.vt = VT_BSTR;
rgProps[2].vValue.bstrVal = SysAllocString(L"SSPI");

// Create the structure containing the properties.
PropSet.rgProperties = rgProps;
PropSet.cProperties = 3;
PropSet.guidPropertySet = DBPROPSET_DBINIT;

IDBProperties *pIDBProperties=NULL;

// create properties pointer

// Set properties
hr=pIDBProperties->SetProperties(1, &PropSet);

// Initialize the data source object.
hr = ppIDBInitialize->Initialize(); // Access voilation exception

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