Can't flash firmwares on arduino por micro. Help!

[Mechavon]

Hello everyone.
Last week I bought the CP2102 to UART converter and the Arduino Pro Micro board. I welded the pins, connected the board to the usb and installed the drivers. But when I installed Arduino Builder Tool, It doesn't detect the board. I cant flash the firmwares. I tried to find the problem but still equally.
Could be a bad welding? An incorrect usb converter?

Leave here the usb and the board

http://www.ebay.es/itm/162046066533?_tr ... EBIDX%3AIT

http://www.ebay.es/itm/CP2102-USB-TTL-U ... 2039204138?

Please help!!!

[Matlo]

Hi,
I moved the topic to the support section.
The boards you selected should work.
Did you follow the instructions at http://gimx.fr/wiki/index.php?title=DIY ... re_loading ?