RDA.Pull And INNER JOINS...

When calling the method below, if I use the SQL in red, the Pull method populates my data correctly. But, If I use the sql in Green, I get an errror message. I have set breakpoints and un the SQL that is returned from the sql statement is green, and it returns records. What gives? Are Joins not allowed?

public void GetDiagnosisList()
{
// Connection string to SQL Server 2000
string rdaOleDbConnectString = "Provider=sqloledb; Data Source=WORKPC;Initial" +
" Catalog=database;User Id=username;Password=password";
// string SQLGet = "SELECT tblLUDiagnosis.strDiagnosisCode, tblLUDiagnosis.strDiagnosisDesc FROM tblLUDiagnosis" +// " INNER JOIN tblPatientEpisode ON tblLUDiagnosis.strDiagnosisCode = tblPatientEpisode.strPrimaryDiagnosis" +// " WHERE tblPatientEpisode.intHospitalID =" + intHospitalID;
string SQLGet = "SELECT TOP 15 tblLUDiagnosis.strDiagnosisCode, tblLUDiagnosis.strDiagnosisDesc FROM tblLUDiagnosis";

SqlCeRemoteDataAccess rda = new SqlCeRemoteDataAccess();
try
{
rda.InternetUrl = "http://WORKPC/SQLCE/sscesa20.dll";
rda.LocalConnectionString = "Provider=Microsoft.SQLSERVER.OLEDB.CE.2.0;" + CONN_STRING;
rda.Pull("tblLUDiagnosis",SQLGet,rdaOleDbConnectString, RdaTrackOption.TrackingOnWithIndexes, "ErrorTable");
MessageBox.Show("Diagnosis Synchronized");
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}