ESP 13(ESP8266 chip) shield

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i trying work esp 13 shield have purchased, 1 has silver chip reads to:"esp8266mod", "ai thinker"). has 2 dip switches, "key" button , "rst" one.
now tried reason can't firmware uploaded board. when use esp8266 flash downloader, creates log file following:

exception in thread thread-3:
traceback (most recent call last):
  file "threading.pyo", line 810, in __bootstrap_inner
  file "esp8266_flasher.py", line 19, in run
  file "downloader.pyo", line 54, in __init__
  file "serial\serialwin32.pyo", line 38, in __init__
  file "serial\serialutil.pyo", line 282, in __init__
  file "serial\serialwin32.pyo", line 66, in open
serialexception: not open port 'com13': windowserror(5, 'access denied.')

i tried few times, few softwares, , each time, checked dip switches on, , off restart upon state change of dip switch.
i helpless, please :)

something else has com13 open, or pointed @ wrong port.

if using arduino ide 1.6.8 on windows, break serial ports while running, use 1.6.5r5 or 1.6.9.


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