I installed GPS tool as plug-in and GPSBabel as additional software. I connected GPS through USB cable.
I set new GPS device edittor according to below site. [http://nickmcw.wordpress.com/2010/07/30/quantum-gis-using-a-usb-gps-device/]
But, I can not download GPX from Download GPS tool tab from GPS tool. Upload tab also does not work. I can not select layer, though I put GPX file on layer of QGIS.
Following is error message when downloading GPX file. [Layer is not Valid and can not to be add to the map]
Anybody has idea what i am wrong?? Thank you so much in advance.