RAM issue - not an optimal setting

Hello everybody,
I have a question regarding Windows Vista 64 on a Macbook with Mac OSX 10.5.6.. The Macbook has 4GB of RAM; therefore i decided to give 2GB to te virtual machine. But when i choose this setting there is a small hint "Some settings are not optimal". Why is it a "problem" to give 2GB to the virtual machine?
Thanks a lot
Lars
I have a question regarding Windows Vista 64 on a Macbook with Mac OSX 10.5.6.. The Macbook has 4GB of RAM; therefore i decided to give 2GB to te virtual machine. But when i choose this setting there is a small hint "Some settings are not optimal". Why is it a "problem" to give 2GB to the virtual machine?
Thanks a lot
Lars