thanks por reading my question, i use to load a report with a button, after selecting dates (from and to), y use mysql and c#, and here are some images so you can look my issues.
Here is the principal issue/error
Here is my Report, as you can see, at the left side, it has the parameters required
Here i have the dataset/Query to that report, it has the @parameters here too
Finally, the code when i do clic to generate the report
