Conversion MSAccess -&&> SSCe

We have plan to migrate our database from Access to SqlCe.

Here our situation:

We will never use a Pocket PC applications, only Windows desktop application.
We want to migrate the .mdb file to a .sdf file (I've seen the ADS application, but since we don't use mobile devices, it's no use)
The .sdf will be use on local client machine only.
Here's my problems:

I've use a conversion to migrate from access (http://www.primeworks-mobile.com/Downloads/DPW.html) and seem to work fine.
I updated the source code to use the SqlServerCe dll instead of OleDB.
Some of my queries work fine, but others just won't work in VS2005 using C#.

To check if the query is really wrong, I take exactly the same query and put it Query Builder from the Server Explorer in VS2005.
And the query just work fines!!! It's bring back all the records asked for, and I've got an error for the same query from my source code.

I'm using a datatable, here's the code used for filling the DataTable. I've got an error on the line adapter.FillSchema()






string connectionString = @"Data Source=" + fic_parent.CheminFichierComplet;
using (SqlCeConnection connection = new SqlCeConnection(connectionString))
{
SqlCeDataAdapter adapter = new SqlCeDataAdapter();

connection.Open();

SqlCeCommand command = new SqlCeCommand(requete, connection);

command.CommandType = CommandType.TableDirect;
adapter.SelectCommand = command;

tableResultats = new DataTable();
adapter.FillSchema(tableResultats, SchemaType.Source);
adapter.Fill(tableResultats);

// Close connection
connection.Close();
}



Error is:

Message="The specified table does not exist. [ (...) ]"
Source="SQL Server 2005 Everywhere Edition ADO.NET Data Provider"
HResult=-2147217865
NativeError=0

Here my questions:

Is it possible to have an application that will convert my Access databases to an SSCe .sdf file ?
Why I can query in Server Explorer and can't in my source code using the same sql statement ?

At which level my code isn't good, because I just replace all OleDB* --> SqlCe* in my code.
I hope that I explain clearly my problem, do not hesitate to ask me questions about this problem.