Norton won`t detect these viruses ( 2012 , 19.5.0.145 )

Hi

 

yesterday a freind of mine , game me his usb flash drive , and it contains viruses , but norton didn`t detect and remove them , i compreed viruses and it has pass = 1 :

 

http://www.mediafire.com/?o5wd6dob15w77q5

 

please tell me what`s the problem ?

 

attachments had problem so i upload it on MF