Help with allocating more ram to forge server

[gandalforger]

Hello. I am currently having problems with allocating ram to forge server jar file. 

I create a bat file to start the forge server. 

"java -Xmx 1024 -Xms 1024 -jar <server filename>.jar"

But no matter what i do I always get this error:

Invalid maximum heap size: -Xmx
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

So far I've tried:

-Uninstalling 32 bit Java and installing 64 bit.

-Win+R>sysdm.cpl>Create new environment variable

-Lower the amount of ram 

Note that if I run the normal forge server file, it works just as normal but because it uses a lower amount of ram, it is laggy. So no problems with launching the server. Problem is, I can not allocate more ram to it. I play on version 1.15.2

[gandalforger]

How can I prove it? Do you want a screenshot of it?