FYI, I have forwarded this to D-Link, again.

Will see if we get any information. Nothing guaranteed. It's recommended that if anyone has a problem with this feature and you are using an ISP UP link speed of 2Mb or higher, you'll need to phone contact D-Link support and report and inquire about this. This is a known issue. Nothing in the forums here will directly fix or resolve this. This is a issue at the FW level and needs to be addressed by D-Link directly.
For those who can not get the router working, even after calling D-Link support, I would recommend that you return the router and give one of the following router models a test as they have selectable UP link speeds higher than 2Mb:
DIR-645, DIR-636L, DIR-826L, DIR-836L, DIR-856L, DIR-835(The one I had did have optional UP Link speeds.), DIR-845L, DIR-850L. The DIR-855L doesn't report having higher selectable UP Link speeds so this model could be effected by this limitation. The DIR-868L is currently unknown on it's QoS UP link options and the upcoming DGL-5500 has a new UI and different QoS engine so this should not be an issue. We'll see when it's released in the next coming months.

Please be patient for information about this.
Thank you.