I am running into an error while executing
  $ ufw enable

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Longer version:

I am running this on weloveservers.net and I have done a complete wipe out and re-install OS from the control panel. 

I am running this on ubuntu 13.10 now. 

Following the instruction, I am executing (instead of executing the script, I run line by line on command line):

  $ ufw --force enable

I am getting:

ERROR: problem running ufw-init
libkmod: ERROR ../libkmod/libkmod.c:505 kmod_lookup_alias_from_builtin_file: could not open builtin file '/lib/modules/2.6.32-042stab090.3/modules.builtin.bin'
FATAL: Module nf_conntrack_ftp not found.
libkmod: ERROR ../libkmod/libkmod.c:505 kmod_lookup_alias_from_builtin_file: could not open builtin file '/lib/modules/2.6.32-042stab090.3/modules.builtin.bin'
FATAL: Module nf_nat_ftp not found.
libkmod: ERROR ../libkmod/libkmod.c:505 kmod_lookup_alias_from_builtin_file: could not open builtin file '/lib/modules/2.6.32-042stab090.3/modules.builtin.bin'
FATAL: Module nf_conntrack_netbios_ns not found.
ip6tables-restore: line 4 failed
ip6tables-restore: line 65 failed
ip6tables-restore: line 69 failed
sysctl: permission denied on key 'net.ipv4.tcp_sack'

Problem running '/etc/ufw/before6.rules'
Problem running '/lib/ufw/user6.rules'


Some googling showed that this kind of issues could occur on OpenVZ.  Some people recommend commenting out rules in before6.rules and user6.rules. 

Did any of you see have issue executing "ufw enable"?  Or it is just me?  Which OS version did you choose?  I am using ubuntu 13.10. 

Thanks ahead...