max data segment size problem (process can not allocate more then 1gb memory)

[freebsd]

hello all,
i have problem, when process tryes to allocate more then 1gb memory it 
coredumps
i have tryed options MAXDSIZ to 1.5gb but kernel panics
when i put it in loader.conf with kern.maxdsiz kernel panics again
this is my server memory configuration:
vm.kvm_size: 1069543424
vm.kmem_size: 209715200
hw.machine: i386
hw.model: Intel(R) Xeon(TM) CPU 2.40GHz
hw.ncpu: 2
hw.byteorder: 1234
hw.physmem: 2142654464
hw.usermem: 1622208512
hw.pagesize: 4096 

can you tell me how can process allocate more then 1gb memory
thanks in advance