困扰我很久的问题了，一直没有弄明白，求教！（ADO编程）

下面这段代码大家应该比较熟悉吧：
#import "c:\Program Files\Common Files\System\ADO\msado15.dll" \
no_namespace rename("EOF", "EndOfFile")

#include <stdio.h>
#include <icrsint.h>
_COM_SMARTPTR_TYPEDEF(IADORecordBinding, __uuidof(IADORecordBinding));

inline void TESTHR(HRESULT _hr) { if FAILED(_hr) _com_issue_error(_hr); }

class CCustomRs : public CADORecordBinding
{
BEGIN_ADO_BINDING(CCustomRs)
ADO_VARIABLE_LENGTH_ENTRY2(2, adVarChar, m_ch_fname,
sizeof(m_ch_fname), m_ul_fnameStatus, false)
ADO_VARIABLE_LENGTH_ENTRY2(4, adVarChar, m_ch_lname,
sizeof(m_ch_lname), m_ul_lnameStatus, false)
END_ADO_BINDING()
public:
CHAR m_ch_fname[22];
CHAR m_ch_lname[32];
ULONG m_ul_fnameStatus;
ULONG m_ul_lnameStatus;
};

void main(void)
{
::CoInitialize(NULL);
try
{
_RecordsetPtr pRs("ADODB.Recordset");
CCustomRs rs;
IADORecordBindingPtr picRs(pRs);

pRs->Open("SELECT * FROM cc ",
"dsn=MNDB;uid=cuiql;pwd=cuiql;",
adOpenStatic, adLockOptimistic, adCmdText);

TESTHR(picRs->BindToRecordset(&rs));
strcpy(rs.m_ch_fname,"aaaa");
strcpy(rs.m_ch_lname,"bbbbb");
picRs->AddNew(rs);
// while (!pRs->EndOfFile)
// {
// 处理CCustomRs中的数据
// printf("Name = %s %s\n",
// (rs.m_ul_fnameStatus == adFldOK ? rs.m_ch_fname: "<Error>"),
// (rs.m_ul_lnameStatus == adFldOK ? rs.m_ch_lname: "<Error>"));

// 移动到下一行，新行的值会被自动填充到对应的CCustomRs的变量中
// pRs->MoveNext();
// }
}
catch (_com_error &e )
{
printf("Error:\n");
printf("Code = %08lx\n", e.Error());
printf("Meaning = %s\n", e.ErrorMessage());
printf("Source = %s\n", (LPCSTR) e.Source());
printf("Description = %s\n", (LPCSTR) e.Description());
}
::CoUninitialize();
}
当表中为空时，增加记录就会报错！我是新手。请高手明示。不胜感激呀