vpn config for shrew soft vpn client

I wonder whether I am the only one having these problems.

I can't connect with my windows 7 home premium to Lion server vpn.

I can connect with it through my iphone, so the server works.

Since I am unable to change any security policy stuff I downloaded shrew soft vpn client.

But I can't find any documentation which settings the mac vpn system uses for the connection.

Hope someone can help me