kprims:
I have a bunch of Pro Minis. Looking them over this morning and I see that some have the pins switched. DTR on one side and then the other. Make sure the pin layout for the FTDI232 is the same on each Pro Mini you connect. Use the Reset button just as the sketch is uploaded. Double check the TX0 and RX0. Run the loopback test on the FTDI.
Thanks for your answers!!
I took a look to the pins as you told me, and the pro minis of 3.3V and 5V that I have, have the same pinout (at least, is what is write on the boards, internally I didn't tried yet).
When I connect the FTD1232 to the pro minis, I put:
Vcc -> Vcc
GND -> GND
DTR -> DTR
RX -> TX0
TX -> RX1
Tried the reset while uploading (pressing at the beggining, at the end and in the middle of the upload, and holding it), and before and after of the upload.
Just did the loopback test on the FTD1232, and works fine (Connected to the usb PC trough cable, connected its RX and TX together, and used Putty).
Thanks again.