max resolution dell latitude with e-port replicator

I have the following scenario:

• Laptop: Dell Latitude E6420 i7 with Intel HD Graphics 3000
• Monitor: 30' Dell 3007WFP (up to 2560x1600 resolution)
• Docking Station: Dell e-port replicator T308d
• Adapter: Dell Display Port To DVI-D Adapter Cable DP/N 023NVR

Problem: The 30" monitor Maximum resolution available is 1280x800.

Question:

Let's say I can't get the monitor's 2560x1600 resolution with this Intel integrated HD3000 card or with the e-port replicator because the laptop doesn't have native DVI-D Dual Link, I should be able to get at least 1920x1080 by the Display port. Any fix to get better resolution than 1280x800?

Some of the steps taken so far:

1. The monitor only has a DVI-D Dual Link port so I'm using a DVI-D Dual link to DVI-D Dual Link cable to connect to the docking station, won't work, I read somewhere that the e-port replicator is actually DVI-D Single Link inside so won't work because the monitor needs native DVI-D Dual Link.
2. Using the same DVI-D Dual Link to DVI-D dual link cable, but this time I add a DVI-D Dual link to Display port adapter and connect to the Display port port in the e-port replicator, still the same issue.
3. Connect directly to the laptop using DVI-D Dual Link to HDMI cable, still the same.
4. Also tried manually adding custom resolutions in the Intel Graphics Control Panel like 1920x1800, or using 50p Hz Refresh Rate, 30p Hz, etc. timing standard CVT or GTF or CVT-RB. When I apply those custom settings the monitor's screen goes black like if it doesn't support it so it changes back to 1280x800.
5. All Drivers are up to date.

Help will be greatly appreciated! -