ipod touch gen 5 isnt detected on windows -> works on mac

Theres an ipod 5 gen, mac detects it excelent, works perfectly on mac, whn i connect it to itunes on ewwindows it gets detected but asks for format, after windows format it itunes doesnt detects it anymore... again i can reformat on mac (when connected it does oppen itunes but it isnt shown on device) already reinstalled itunes, updated itunes, updated ipod firmware, etc...