Can't upload sketches to my homemade arduino

Hi,

I made this arduino for a school project but I can't get it to work. In fact I can't upload sketches into. That's what I have: - Arduino serial2USB light adapter ( http://arduino.cc/en/Main/USBSerial) - My custom arduino PCB - Arduino 1.0.5

What I'm trying to do: I'm trying to upload a sketch on it using Arduino IDE and Arduino's Serial2USB Light Adapter.

Error I get on Arduino IDE avrdude: stk500_getsync(): not in sync: resp=0x00

Notes - Drivers are installed correctly and COM is successfully set. - ATMEGA 328P-PN is already programmed with Optiboot - When I press Reset button nothing happens.

SERIAL- PCB CONNECTIONS 5V- 5V GND-GND TX-RX RX-TX RESET/EXT- DTR

PCB SCHEMATICS

If you need further informations please ask :) Thank you for your help

(deleted)

thanks. What should I do to fix this error?

(deleted)

so there's a problem with reset button? :| I don't understand

(deleted)

sorry, I'm not an electronic and I don't understand what should I do :)

Could you explain me ? Thank you :)

I'm using a jumper to connect DTR to RESET pin and ATMEGA 1st PIN (RESET). I've also used a capacitor and a 10kOhm res.

What is wrong? (see first image on first post :) )

Found a fix! There was a connection problem with OSC. Here's the solution (many thanks to Christian Aschoff of Fritzing forum):

http://fritzing.org/forum/thread/3394/?page=last