This is a transcript from the error log.

Code:
Preparing packages for installation...
zimbra-core-5.0.7_GA_2444.RHEL5-20080626020941
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!