When i try to use pptp conntrack module and the proto gre module i get this in the log file, anyone know what can be wrong? kernel: ip_conntrack_pptp.c: bad csum kernel: ASSERT ip_conntrack_core.c:94 &ip_conntrack_lock readlocked kernel: ASSERT ip_conntrack_core.c:1067 &ip_conntrack_lock not readlocked kernel: ASSERT ip_conntrack_core.c:1076 &ip_conntrack_lock not readlocked kernel: ASSERT: ip_nat_core.c:839 &ip_conntrack_lock not readlocked kernel: ASSERT ip_conntrack_core.c:94 &ip_conntrack_lock readlocked kernel: ASSERT: ip_nat_core.c:839 &ip_conntrack_lock not readlocked kernel: ASSERT ip_conntrack_core.c:94 &ip_conntrack_lock readlocked kernel: ASSERT: ip_nat_core.c:839 &ip_conntrack_lock not readlocked kernel: ASSERT ip_conntrack_core.c:94 &ip_conntrack_lock readlocked kernel: ASSERT: ip_nat_core.c:839 &ip_conntrack_lock not readlocked