ASP.NET, SQL Server, WPF, C#, VB.NET

I need to get the DB Literals for a data source from the connection string in 
 
a native C++ app using COM. 
 
I've tried opening the schema with adSchemaDBInfoLiterals and it appears to 
 
return values (field count is 7) but when I try to access a field I get error 
 
800a0cc1 "Item cannot be found in the collection corresponding to the 
 
requested name or ordinal" 
 
This is the basic code...can anyone see what's wrong? 
 
_ConnectionPtr  pConnection    = NULL; 
 
_RecordsetPtr  pRstSchema  = NULL; 
 
HRESULT  hr = S_OK; 
 
_bstr_t strCnn(strConnectString.c_str()); 
 
try 
 
{ 
 
// Open connection. 
 
TESTHR(pConnection.CreateInstance(__uuidof(Connection))); 
 
pConnection->Open (strCnn, "", "", adConnectUnspecified); 
 
pRstSchema = pConnection->OpenSchema(adSchemaDBInfoLiterals); 
 
pRstSchema->MoveFirst(); 
 
while(!(pRstSchema->IsEOF)) 
 
{ 
 
CString scnt; 
 
scnt.Format("count is %d",pRstSchema->Fields->Count); 
 
MessageBox(NULL,scnt,"count",0); // shows count as 7 
 
// This line causes the error 
 
MessageBox(NULL,(char*)pRstSchema->Fields->Item[0]->Name,"item 1",0);