CeSeekDataBaseEx fails error code 25 (SEEK_ERROR)

Hello,
I'm trying to search for a recond in a Windows CE database. : I do the falowing code :
This for the creation of the database
#define RF_TAG 0
#define RF_DESC 1
#define PL_RFID (MAKELONG(CEVT_LPWSTR,RF_TAG))
#define PL_DESC (MAKELONG(CEVT_LPWSTR,RF_DESC))

CEDBASEINFO dbInfo;
memset (&dbInfo, 0, sizeof(dbInfo));
wcscpy (dbInfo.szDbaseName , TEXT("RfIdTag"));
dbInfo.dwFlags =  CEDB_VALIDNAME ;
dbInfo.wNumSortOrder = 2;
dbInfo.rgSortSpecs[0].propid = PL_RFID;
dbInfo.rgSortSpecs[0].dwFlags = 0;
dbInfo.rgSortSpecs[1].propid = PL_DESC;
dbInfo.rgSortSpecs[1].dwFlags = 0;
dbInfo.dwDbaseType=0;

CeMountDBVol(guid,TEXT("\\RfIdDataBase.vol"),OPEN_EXISTING)
dbx = CeCreateDatabaseEx(guid, &dbInfo);

This part of code is working (there no error while running) becase the database is realy created.

Once the data base is created I insert a lot of records (this works to) the size of the database file is increasing:

CEPROPVAL myRec[2];
TCHAR * pRfTag = (TCHAR *) rfTag.GetString();
TCHAR * pRfDesc = (TCHAR *) rfDesc.GetString();


myRec[RF_TAG].propid = PL_RFID;
myRec[RF_TAG].val.lpwstr = pRfTag;
myRec[RF_DESC].propid = PL_DESC;
myRec[RF_DESC].val.lpwstr = pRfDesc;
CEOID rs = CeWriteRecordProps(m_CEDB,0,2,myRec);

My problem is when i try to find a record using CeSeekDataBaseEx.


      WORD cProps = 1;
      //LPByte pBuff = NULL;
      DWORD cByte = 0;
      CEPROPVAL look;
      USES_CONVERSION;


      look.propid = PL_RFID;
      look.val.lpwstr = T2W(lpszItem);
      look.wFlags = 0;
      look.wLenData = 0;
      m_CEDB= OpenDataBase(_T("rfidDB.db"),0,CEDB_AUTOINCREMENT,NULL,0);
      
      if (m_CEDB != INVALID_HANDLE_VALUE)
      {
            CEOID oidSeek = CeSeekDatabaseEx(m_CEDB, CEDB_SEEK_BEGINNING, 0, 0,NULL);
            if(oidSeek == NULL)
            {
                  // error, return error
                  DWORD err = GetLastError();
                  CString sErr=_T("");
                  sErr.Format(TEXT("Erreur CeSeekDatabaseEx : %d"),err);
                  MessageBox(GetForegroundWindow(),sErr,TEXT("ReadRecord"),MB_ICONERROR);
            }
            
            
            
            CEOID ret = CeSeekDatabaseEx(m_CEDB,CEDB_SEEK_VALUEFIRSTEQUAL,(DWORD )&look,1,& cByte);
            if (ret != 0 )
            {
                  MessageBox(GetForegroundWindow(),TEXT("Un enregistrement Trouve"),_T("ReadRecord"),MB_ICONINFORMATION);
            }
            else
            {
                              DWORD err = GetLastError();
                              CString sErr=_T("");
                              sErr.Format(TEXT("Erreur CeSeekDatabaseEx : %d"),err);
                              MessageBox(GetForegroundWindow(),sErr,TEXT("ReadRecord"),MB_ICONERROR);
                              
            }
            CloseHandle(m_CEDB);
      }



The first instruction CEOID oidSeek = CeSeekDatabaseEx(m_CEDB, CEDB_SEEK_BEGINNING, 0, 0,NULL); seems to work because oidSeek is not null.
The second one CEOID ret = CeSeekDatabaseEx(m_CEDB,CEDB_SEEK_VALUEFIRSTEQUAL,(DWORD )&look,1,& cByte); does not work. The record i'am looking for is in the database for sure :) i inserted it at least one time.

The error code i get is 25 this seems to be SEEK_ERROR ...

So can some one told me where i get wrong please ? I'm lost :)

Thanks for your help