Problems with large executables under SuSE 8.2 ....

.... I have a large, FORTRAN 77 program which I maintain for use by government clients (NASA mostly). I just (today) updates the box it is on from RH7.2 to SuSE 8.2, kernel 2.4.20-4GB. When I compile up an executable that wants about 1.3 GB of RAM, it gets killed by the kernel as soon as it starts running (signal 11, segfault). I attach some relevant particulars. I compiled under the Intel FORTRAN compiler, version 8.0.46. I upgraded primarily to get > 1 GB address space, & I don't seem to be getting it. What am I doing wrong ? Thanks in advance.