GPSv2 inaccuracy

I can seem to to get the program on the ESP8266 i have the following error below

I have a arduino uno i have connected the follow

I have removed the chip from the UNO and connected it up the following

Arduino UNO ESP8266(ESP-12F)
RX -----------> RX [size=50](Logic Level Shifter Converter) [/size]
TX -----------> TX
3.3v -----------> VCC
GND -----------> GND
3.3v -----------> CH_EN

and im getting the following error

warning: espcomm_sync failed error: espcomm_open failed error: espcomm_upload_mem failed

I’m not sure what am doing wrong.