"Could not secure enough space for object heap"

[Kuroda]

This is what it looks like when I try to start up a server:

Desktop\Games and related\Games\Builder\Minecraft Collection\SMP\(Technic Craftbukkit Server)>java -Xmx3G -Xms2G -jar Tekkit.jar nogui

Error occurred during initialization of VM

Could not reserve enough space for object heap

Error: Could not create the Java Virtual Machine.

Error: A fatal exception has occurred. Program will exit.

Desktop\Games and related\Games\Builder\Minecraft Collection\SMP\(Technic Craftbukkit Server)>pause

Press any key to continue . . .

and after pressing a key it terminates.

[Ragnar Homsar]

Do you actually have 3 GB of RAM? If not, Java's trying to allocate itself more memory than you actually have.

[Kuroda]

Ah, no I don't. Thank you for helping me.