I'm sorry moses,
webshield checks for several ingored addresses that it cannot redirect. Unfortunately ameritrade.streamer.com is one of them and WebShield does a DNS lookup during startup. I didn't realized this would be a problem. I already changed the config and it will propagate in the next VPS update.
Till then, you can edit your HOSTS file and add the proper record for ametritrade to prevent the lookup.
edit: C:\windows\system32\drivers\etc\hosts
add the line:
198.200.173.139 ameritrade.streamer.com
Sorry for the hassle.
Lukas