I changed the file .conf as you suggested:
This is what I typed:
My windows firewall has been ever
disactivated but as you did I create a new port 10333 and connected it to my IP address.
I deleted also username and password from the p2pool target box properties.
The litecoin wallet failed to start and the p2pool visualized a message of error.
So I deleted that port and I restored .conf file.
As last experiment I transferred whole Scryptminer's directory content to litecoin's directory ( where litecoin Qt file is present ) and I pushed the mining button on the wallet:http://img707.imageshack.us/img707/3463/schermo7.jpg
! Note the line where the p2pool say " current payout: 0.0000 LTC " !
I believed until this lines is in that way I will not receive any coin.
If everything works well p2pool must return a value in that line. It is a good indication of good system operation.
I visualize the same zero value on the static page http://127.0.0.1:9327/static/