Looks ok. Did you tried to reduce time range?
As just21 I also recommend test your account for subscription validity. Try some trial software. I use this one http://stocksharp.com/products/hydra/ (is a free and no have trial period).
If the subscription OK try to analyze response for the request.
As just21 I also recommend test your account for subscription validity. Try some trial software. I use this one http://stocksharp.com/products/hydra/ (is a free and no have trial period).
If the subscription OK try to analyze response for the request.