Error DireWolf20 1.7 Server Can't Launch

[jf428]

So I did everything right and when I launch "ServerStart.bat" this is what its wrote : C:\Users\AmGRy428\Desktop\SERVEUR DW20>if NOT EXIST minecraft_server.1.7.10.jar
(
echo "running install script!"
call FTBInstall.bat
)

C:\Users\AmGRy428\Desktop\SERVEUR DW20>echo "make sure to read eula.txt before p
laying!"
"make sure to read eula.txt before playing!"

C:\Users\AmGRy428\Desktop\SERVEUR DW20>java -server -Xms2048m -Xmx3072m -XXerm
Size=256m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -jar FTBServer-1.7.10-1231.ja
r nogui
Java HotSpot(TM) Client VM warning: ignoring option PermSize=256m; support was r
emoved in 8.0
Error occurred during initialization of VM
Could not reserve enough space for 3145728KB object heap

C:\Users\AmGRy428\Desktop\SERVEUR DW20>pause
Press any key to continue ...

I need help pls !