When I download the latest Interactive Brokers(IB) API (their twsosocketclient.dll) my program stop working. I cannot even get the econnect without the program aborting. I use the old version of twsosocketclient.dll, which can get me to request market data, but then abort also. Does anyone else have similar problem when they upgrade their TWS API. How do I solve the problem. I try to contact IB but they are not responding. Thank you.