How to replace the .dat files with .db files

Dear All,

I am using the series 60 sdk 2.1, in which I am trying to replace the .dat files with .db files, Now I am trying to 
access the data (Read and Write) from the .db files.

Basically What I have done is that, I have created the .db
files, with proper data, with the help of dbms Example code.

After creation of this .db file, I have put this .db file into the c\system\data\ENHANCED\PLUGINS, Now

to read the .db file I have changed the ReadL(), The ReadL
fucntion I have changed because it was written, to read the data from the .dat files, But in my case I have to read the data from the .db files

Now what I see is that application is Crashing.

The changes code is


_LIT(KSQLStatement2,"select Notes from CDs where Artist='ROCK8'");
_LIT(KCol1, "Artist");
_LIT(KCol2, "Notes");
   
RFs fsSession;
CleanupClosePushL(fsSession);
User::LeaveIfError(fsSession.Connect());
RFile file2;
   
CFileStore* store = CFileStore::OpenLC(fsSession,KRMContactsFile,EFileRead|EFileWrite);
   
RDbStoreDatabase database;
RDbView view2;

User::LeaveIfError(view2.Prepare(database,TDbQuery(KSQLStatement2,EDbCompareNormal)));

User::LeaveIfError(view2.EvaluateAll());

CDbColSet* colSet = view2.ColSetL();


// retrieve the 1 row
view2.GetL();

// while the rowset is on this row, can use a TPtrC to
// refer to any text columns
TPtrC artist = view2.ColDes(colSet->ColNo(KCol1));

// and a stream for long columns
RDbColReadStream in;

TDbColNo col = colSet->ColNo(KCol2); // Ordiginal position of long column

in.OpenLC(view2, col);
      
//Added this code
HBufC8* notes = HBufC8::NewL(view2.ColLength(col));
TPtr8 DataPtr = notes->Des();
in.ReadL(DataPtr,view2.ColLength(col));
User::LeaveIfError(file2.Write(DataPtr));
User::LeaveIfError(file2.Flush());
in.Close();
CleanupStack::PopAndDestroy();
   
file2.Close();
fsSession.Close();

CleanupStack::PopAndDestroy(2); // iItem, iFs
}


Please let me know what its failing, Well One intresting thing is that when I change the format of the .dat file
to the .db in the _LIT and run the ReadL (), in this fucntion i just open the store. Then also it is crashing.

Please let me know and guide me, whats the mistake I am doing as I am new to the Symbian OS.

Thanks In Advance
Ranjeet.