2Gb process on 32 bits

[Isart Montane]

Hi all,

i'm experiencing some trouble when i'm trying to lauch solr with more 
than 1.6GB. My server is a FC5 with 8GB RAM but when I start solr like this

java -Xmx2000m -jar start.jar

i get the following errors:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

I've tried to start a virtual machine like this

java -Xmx2000m -version

but i get the same errors.

I've read there's a kernel limitation for a 32 bits architecture of 2Gb 
per process, and i just wanna know if anybody knows an alternative to 
get a new 64bits server.

Thanks
Isart