ado访问库时内存上涨

我写了个用ado访问数据库的类,做测试的时候我不停的读库,关闭库,可是发现内存一直在涨,我该释放的地方也释放了,以下打开库和关闭库的代码,希望有高手能帮我看一下
BOOL CDataBase::OpenMyConnection()
{
HRESULT hr;
m_connect=FALSE;
try
{
hr = m_pConnection.CreateInstance("ADODB.Connection");///创建Connection对象 if( SUCCEEDED(hr) )
{//SHOUGBF2//WJTEST
CString strConn;
strConn.Format("Provider=MSDAORA.1;Password=%s;User ID=%s;Data Source=%s;Persist Security Info=True;",m_password,m_username,m_servername);
// hr = m_pConnection->Open((_bstr_t)strConn,"","",adConnectUnspecified);//adConnectUnspecified
m_connect=TRUE;

}

}
catch(_com_error e)///捕捉异常 {

CloseMyConnection();
CString temp;
temp.Format("连接数据库错误信息::%s",e.ErrorMessage());
      //::::MessageBox(NULL,temp,"提示信息",NULL);
m_connect=FALSE;
         } return m_connect;
}void CDataBase::CloseMyConnection()
{
if(m_pConnection!=NULL)
{
try
{
if(m_pConnection->State!=adStateClosed)   
{
m_pConnection->Close();
}
m_pConnection.Release();
m_pConnection=NULL;
}
catch(_com_error e)///捕捉异常
{
m_pConnection.Release();
//m_pConnection->Release();
m_pConnection=NULL; }
}
}