Ensure your device is actually V2 . You can find the hardware version (H/W Ver) on the sticker located at the bottom of the router.
1.0.03
Finding the link often requires navigating the regional fractals of D-Link’s support sites. A router purchased in one region may be unsupported in another. The link is often buried in the "Legacy" or "End of Life" sections—a digital graveyard where drivers go to await the final silence of a broken capacitor or a fried power adapter. dlink dsl2750u v2 latest firmware update link