Selecting the Server Type button will give you the screen below.
These are the options that will give you the most efficient connection- you should make sure that your settings match this.
You see that "NetBEUI and IPX/SPX Compatible" have been unchecked. This decreases the time needed to negotiate a PPP session since Msen uses TCP/IP only.
If you select the TCP/IP Settings button (you shouldn't need to), you are given the following dialogue: (next page!)