problem in upload backup to file repository on plesk 11.5.30

[hesama]

hi
im install plesk 11.5.30 on centos 6.5 64bt when upload backup to file repository show this error : 504 Gateway Time-out nginx
and backup is not upload
my backup size : 3gb
how resolv this problem ?
thanks

 

[abdi]

http://kb.parallels.com/en/119499