This is a transcript from the error log.

Preparing packages for installation...
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
error: %post(zimbra-core-5.0.7_GA_2444.RHEL5-20080626020941.i386) scriptlet failed, exit status 1
I've been searching the forums for the different errors but i can't find anything related. I'm trying to install it on a Media Temple (dv) box.

Please tell me if there's anything else i should add to this post!