Hi to all

To this time i have some troubles to send some
Hex chars. I'm using a 16f628a, 9600 bauds
Most of the chars print whitout troubles however
Chars $04, $40, $A2, $D6,$13 don't work, on the terminal shows 00 or empty. The serial configuration as fine. But i can't understand the reason. The realterm software and pic are setting properly. I aprecciate any advice about this issue.
Best Regards