[Koha] koha installation error on ubuntu/lubuntu 12.04 64 bit version

[Sunita Barve]

i am struggling to install koha on ubuntu/lubuntu 12.04 64 bit
version. Web installation is successfull also i could add few records
but OPAC search does not work.

Here are few last lines of intranet log and opac log.

Intranet log

mainpage.pl: DBD::mysql::st fetchrow_hashref failed: fetch() without
execute() at /usr/share/koha/lib/C4/Languages.pm line 355.
[Sun Oct 20 19:10:11 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:10:11 2013] mainpage.pl: DBD::mysql::st execute failed: Table
'koha_library.language_descriptions' doesn't exist at
/usr/share/koha/lib/C4/Languages.pm line 360.
[Sun Oct 20 19:10:11 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:10:11 2013] mainpage.pl: DBD::mysql::st fetchrow_hashref failed:
fetch() without execute() at /usr/share/koha/lib/C4/Languages.pm line
361.
[Sun Oct 20 19:10:11 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:10:11 2013] mainpage.pl: DBD::mysql::st execute failed: Table
'koha_library.language_descriptions' doesn't exist at
/usr/share/koha/lib/C4/Languages.pm line 354.

opac log

 opac-search.pl: Use of uninitialized value $_ in pattern match (m//)
at /usr/share/koha/opac/cgi-bin/opac/opac-search.pl line 39., referer:
http://localhost:6666/cgi-bin/koha/opac-search.pl?q=radio
[Sun Oct 20 19:39:21 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:39:21 2013] opac-search.pl: Use of uninitialized value $limit_desc
in concatenation (.) or string at
/usr/share/koha/opac/cgi-bin/opac/opac-search.pl line 631., referer:
http://localhost:6666/cgi-bin/koha/opac-search.pl?q=radio
[Sun Oct 20 19:39:23 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:39:23 2013] opac-search.pl: Use of uninitialized value $_ in
pattern match (m//) at
/usr/share/koha/opac/cgi-bin/opac/opac-search.pl line 34., referer:
http://localhost:6666/cgi-bin/koha/opac-search.pl?q=radio
[Sun Oct 20 19:39:23 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:39:23 2013] opac-search.pl: Use of uninitialized value $_ in
pattern match (m//) at
/usr/share/koha/opac/cgi-bin/opac/opac-search.pl line 39., referer:
http://localhost:6666/cgi-bin/koha/opac-search.pl?q=radio
[Sun Oct 20 19:39:23 2013] [error] [client 127.0.0.1] [Sun Oct 20
19:39:23 2013] opac-search.pl: Use of uninitialized value $limit_desc
in concatenation (.) or string at
/usr/share/koha/opac/cgi-bin/opac/opac-search.pl line 631., referer:
http://localhost:6666/cgi-bin/koha/opac-search.pl?q=radio

can some one help?

reg

Sunita