Problem with l2tp/|IPSec on windows client

Hi all.

I am trying to setup L2TP connection with IPsec on mikrotik as server and windows xp as a client. I am encountering a problem with it, since it constantly gives me an error that security is not well defined so it can negotiate the conenction. On one side i have fixed public IP address on mikrotik as server which is directly connected. I just enabled L2Tp server, created ppp secret and created peer with automatic policy generation in IPsec, with address being 0.0.0.0 because my connection from client is through ADSL which has dynamic IP address.

Thats the configuration. can anyone help plz?

thank you very much