problem with mpich2 on freebsd 7.2

ady <[email protected]>
Newsgroups gmane.os.freebsd.devel.cluster
Message-ID <[email protected]>
hi everyone, i'm ady, undergraduate student@bandung institute of tech. 
i'm planning to develop a HPC with MPICH2 and SGE on freebsd 7.2 for my 
final assessment.
i install sge-6.2.2.1_1 successfully, but getting stuck when installing 
mpich2. here's the log

master# cd /usr/ports/net/mpich2
master# make install clean
===>   mpich2-1.0.7_3,3 depends on file: /usr/local/bin/python2.5 - found
===>   mpich2-1.0.7_3,3 depends on executable: gfortran43 - not found
===>    Verifying install for gfortran43 in /usr/ports/lang/gcc43
Making GCC 4.3.4 for FreeBSD 7.2  target=i386-portbld-freebsd7.2
You need to increase the datasize limit to at least 700000 (and set
kern.maxdsiz="734003200" in /boot/loader.conf) to build with Java
support.
*** Error code 1
Stop in /usr/ports/lang/gcc43.
*** Error code 1
Stop in /usr/ports/net/mpich2.

master# uname -a
FreeBSD master.blackbox.net 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May  
1 08:49:13 UTC 2009     
[email protected]:/usr/obj/usr/src/sys/GENERIC  i386

does anybody can help me explain this problem?what should i do?
thx for ur appreciation

-regards
NB: i running 7.2 on vmware 5.5, and planning develop diskless system
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