Minecraft server .bat file won't run

I wrote down a load of stuff before I accidently erased it all, so I'll try to make this short. I was trying to increase the amount of ram in my minecraft server, so I googled it and found a video, it told me to make a text file, put this in it: "C:\Program Files (x86)\Java\jre7\bin\javaw.exe" -Xmx512M -Xms512M -jar Minecraft_Server.exe, and save it as run.bat in my minecraft server folder. I did that, but when I try to run it, I can't! It just closes immediately. I tried running it in command and it says: run.bat is not recognized as an internal or external command, operable program or batch file. PLEASE help or give me another way to reduce lag on my server. Thanks in advance! (btw I actually wrote this faster than before even though it's longer lol)