installer - InetLoad::load throws connection error nsis -

i trying download file using

inetload::load "https://www.dropbox.com/xxx/xxx.exe" "$instdir\temp\xxx.exe" 

but giving me connection error. idea how overcome connection error.

i have tried inetc::get no use. guessing same issue inetc plugin also.

inetc uses wininet, same internet library internet explorer. network problem on end? works fine me:

section initpluginsdir inetc::get "https://www.dropbox.com/s/xxxxxxx/yyyy.exe?dl=1" "$pluginsdir\vcredist_x86.exe" /end pop $0 detailprint $0 sectionend 

have tried inspect network traffic wireshark or fiddler?