also i noticed the following in My_PeSePe wifi on code:

+ iptables -t nat -F
iptables v1.4.6: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

My_PeSePe check if you can install the iptables through

apt-get install iptables

Maybe the installation of the kernel failed at some point that didn't install the iptables and make the ipt_MASQUERADE to malfunction...