Problem/Bug TexturePack not working on server

Hai i'm DennisFusha a owner of a server.
I have a little problem my texturepack that i put
on my server does not work. Can anyone help me?

Config:

#Minecraft server properties
#Fri Mar 10 21:05:19 CET 2017
spawn-protection=0
query.port=26009
server-name=Unknown Server
generator-settings=
force-gamemode=false
allow-nether=false
gamemode=0
broadcast-console-to-ops=true
enable-query=true
player-idle-timeout=0
difficulty=1
spawn-monsters=false
op-permission-level=1
announce-player-achievements=false
pvp=true
snooper-enabled=true
level-type=DEFAULT
hardcore=false
enable-command-block=true
max-players=20
network-compression-threshold=256
resource-pack-sha1=
max-world-size=29999984
rcon.port=26019
server-port=26009
debug=false
server-ip=5.39.4.128
spawn-npcs=true
allow-flight=false
level-name=Hogwarts
view-distance=10
resource-pack=https://www.dropbox.com/s/dmhoskaz73j44fy/DutchHp%203.0.rar?dl\=1
spawn-animals=false
white-list=true
rcon.password=
generate-structures=true
online-mode=true
max-build-height=256
level-seed=
use-native-transport=true
prevent-proxy-connections=false
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