hpsum not running on livecd on dl380g7

[Paulo Pereira Vingada]

I have a RHEL5.5 64 bits livecd (made it myself with livecd-tools-014-8.el5.rf from epel) that I use to prepare a server for a RHEL/ESX installation.
I have all necessary dependencies on the LiveCD. When I launch hpsum -s -dryrun -b bp000870.xml once copied everything on a temporary disk this runs forever until I cancel operation. The strace output is :
read(5, 0xff852670, 16) = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {25007, 760141630}) = 0
write(9, "Manager.cpp[102]", 16) = 16
write(9, ": ", 2) = 2
write(9, "Starting Inventory", 18) = 18
write(9, "\r\n", 2) = 2
pipe([13, 14]) = 0
fcntl64(13, F_SETFD, FD_CLOEXEC) = 0
fcntl64(14, F_SETFD, FD_CLOEXEC) = 0
write(6, "\0", 1) = 1
pipe([15, 16]) = 0
fcntl64(15, F_SETFD, FD_CLOEXEC) = 0
fcntl64(16, F_SETFD, FD_CLOEXEC) = 0
fcntl64(15, F_SETFD, FD_CLOEXEC) = 0
fcntl64(16, F_SETFD, FD_CLOEXEC) = 0
pipe([17, 18]) = 0
fcntl64(17, F_SETFD, FD_CLOEXEC) = 0
fcntl64(18, F_SETFD, FD_CLOEXEC) = 0
pipe([19, 20]) = 0
fcntl64(19, F_SETFD, FD_CLOEXEC) = 0
fcntl64(20, F_SETFD, FD_CLOEXEC) = 0
pipe([21, 22]) = 0
fcntl64(21, F_SETFD, FD_CLOEXEC) = 0
fcntl64(22, F_SETFD, FD_CLOEXEC) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0) = 5052
fcntl64(15, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(15, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
close(14) = 0
close(17) = 0
fcntl64(18, F_GETFL) = 0x1 (flags O_WRONLY)
fcntl64(18, F_SETFL, O_WRONLY|O_NONBLOCK) = 0
close(20) = 0
fcntl64(19, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(19, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
close(22) = 0
fcntl64(21, F_GETFL) = 0 (flags O_RDONLY)
fcntl64(21, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
select(1024, [13], NULL, NULL, {5, 0}) = 1 (in [13], left {5, 0})
read(13, "", 1) = 0
close(13) = 0
clock_gettime(CLOCK_MONOTONIC, {25007, 762503630}) = 0
clock_gettime(CLOCK_MONOTONIC, {25007, 762539630}) = 0
select(22, [5 12 15 19 21], [], [], NULL) = 1 (in [5])
read(5, "\0", 16) = 1
read(5, 0xff852670, 16) = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {25007, 762726630}) = 0
clock_gettime(CLOCK_MONOTONIC, {25007, 762762630}) = 0
select(22, [5 12 15 19 21], [], [], NULL) = ? ERESTARTNOHAND (To be restarted)

It works like a charm when the operating system rhel55 64bits has been installed (but I MUST do it with my livecd)

the kernel boot options are :
initrd=initrd0.img root=CDLABEL=LiveCDLCI-6.1 rootfstype=iso9660 ro quiet liveimg live_ram ide=nodma ide=noraid n
opat pnpbios=off vga=791 BOOT_IMAGE=vmlinuz0

Thanks for your help