I Can't Start My Minecraft Server With More Ram?

Ok my computer has 8GB of ram but when i try to run my server with this

java -Xmx1024M -Xms1048M -jar craftbukkit.jar
pause

It Says This

C:\Users\Austin\Desktop\Bukkit Server>java -Xmx1024M -Xms1048M -jar craftbukkit.
jar
Picked up _JAVA_OPTIONS: -Xmx512M
Error occurred during initialization of VM
Incompatible minimum and maximum heap sizes specified

C:\Users\Austin\Desktop\Bukkit Server>pause
Press any key to continue…

I have 8gb of ram with windows 7 64 bit what should i do?!

Free

Delete your server, save all the plugins, and redo the whole process of getting bukkit. If that doesn't work, bukkit saves stuff onto your computer, and you might have to reinstall Windows.

Random

Xmx needs to be bigger than xms

java -Xmx1024M -Xms1048M -jar craftbukkit.jar
needs to be
java -Xmx1048M -Xms1024M -jar craftbukkit.jar

Nunya