[Need help!] GNU Screen arguments (flags) and java arguments (flags)

[Agent-null]

I am trying to add flags to "screen" and to "java" to enable utf encoding in console output. I am using Debian 8.

https://msmhq.com/docs/commands/global.html - This page shows that there is msm.conf in /etc/msm.conf.
I have modified line # 165 in msm.conf to include "-Dfile.encoding=UTF8" which is a valid java flag:
DEFAULT_INVOCATION="java -Dfile.encoding=UTF8 -Xms{RAM}M -Xmx{RAM}M -jar {JAR} nogui"

I have also found an "msm" file in /usr/local/bin/msm
I have modified line #3254 to this:
register_server_setting INVOCATION "java -Dfile.encoding=UTF8 -Xms{RAM}M -Xmx{RAM}M -jar {JAR} nogui"
(added -Dfile.encoding=UTF8 which is a valid java flag)
And line #1430 to this:
as_user "${SERVER_USERNAME[$1]}" "cd "${SERVER_PATH[$1]}" && screen -U -dmS "${SERVER_SCREEN_NAME[$1]}" ${SERVER_INVOCATION[$1]}"
(added -U option, which is a valid GNU Screen flag)

And still when starting the server nothing seems to have changed at all.
I have tried a manual server boot via screen, adding the -U flag and adding the java flag (but not adding -dmS "screen" flag) and i got the expected results - I could see UTF-8 characters in console.

Please tell me what i am doing wrong and if possible, how I can make the flags work or get the utf-8 output.

EDIT
After reinstalling everything and adding the same flags - it seems to now work fine.