error installing ECC6 on AIX 6.1

i am installing ECC6 on AIX 6.1, when i run sapint it gives me error:

iauxsysex.c:318: child /tmp/sapinst_exe.209324.1256978362/sapinst (pid 266368) has crashed. Executable directory is /tmp/sapinst_exe.209324.1256978362. Contact Support.

iaextract.c:895: child has signaled an exec error. Keeping directory /tmp/sapinst_exe.209324.1256978362

I am executing it by user root