If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux section_eight 2.6.21.3 #2 Mon Jun 4 14:19:37 CEST 2007 i686 AMD Sempron(tm)   2400+ AuthenticAMD GNU/Linux
 
Gnu C                  4.1.2
Gnu make               3.81
binutils               2.16.1
util-linux             2.12r
mount                  2.12r
module-init-tools      3.2.2
e2fsprogs              1.39
Linux C Library        > libc.2.5
Dynamic linker (ldd)   2.5
Procps                 3.2.7
Net-tools              1.60
Kbd                    1.12
Sh-utils               6.7
udev                   104
Modules Loaded         ipt_LOG xt_tcpudp xt_state xt_pkttype ipt_REJECT xt_multiport xt_conntrack iptable_mangle nf_conntrack_ipv4 nf_conntrack iptable_filter ip_tables x_tables af_packet ndiswrapper nls_iso8859_15 nls_cp850 vfat fat nls_base sd_mod lirc_serial lirc_dev stv0299 dvb_ttpci dvb_core saa7146_vv video_buf saa7146 videodev v4l2_common v4l1_compat ttpci_eeprom usb_storage scsi_mod