You need to do a little more reading about how to use RS232. You need to use standard baud rates because they are generated by controllers with a limited range. 27MHz is not a very good frequency for generating a standard baud rate because you can't get the right rates by division. 11.0592MHz is a good frequency, or multiples of it.
To get, for instance, 9600 baud (directly, without implementing a proper UART) you need to divide your clock by 2812.5. You can't do that so you'll get a small, but acceptable error. Faster baud rates are likely to have larger errors. Divide your clock by 2812 and see if your PC (set to 9600 baud) can pick up your transmission.