Code:
<loginserver1>
<host>172.16.210.11</host>
<port>5999</port>
<account></account>
<password></password>
</loginserver1>
<loginserver2>
<host>172.16.210.11</host>
<port>5999</port>
<account></account>
<password></password>
</loginserver2>
If you're not using 2 distinct login servers, I would delete the <loginserver2> tag and remove the enumerator from <loginserver1>.
Two streams to the same login server is probably not a good thing...
Still doesn't match what you're telling the world server to use above.
If there's an issue using the same port, I would try to figure out what is causing the problem.