Una mano :( con Insert en Zeo's

[DTAR]

Query.ParamByName('Clave').AsString := Clave.Text;
Query.ParamByName('Materia').AsString := Materia.Text;
Query.ParamByName('Creditos').AsInteger := StrToInt(Creditos.Text);
Query.ExecSQL;
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query.sql.text:=('insert into TU_TABLA (clave,materias,creditos) values ("'+Clave.Text+'","'+Materia.Text+'","'+StrToInt(Creditos.Text)+'" ');
query.execsql;