Sorry for the problems. We had a misconfigured firewall. The TWS is designed to recover from such a failure by attempting to get the data from a different source, but this failed. We'll have it fixed.
These hiccups happen in conjunction with moving the HK customers onto farms, the benefits of which are increased mkt-data refresh rates, increased number of free-of-charge symbols and decoupling of order-routing and market-data links. (This is not meant to be an excuse, just an explanation of what we were trying to accomplish).