Resolution in Backtrack 5 R2 on my laptop

view story

http://www.backtrack-linux.org – Hello Firstly, sorry for my bad english. I recently installed Backtrack 5 R2 GNOME 64bits in my hard disk and I have a problem with the screen resolution. My laptop is an ASUS N53SN with a Nvidia graphic card (Nvidia Geforce GT 550M CUDA 2GB). The problem is that Backtrack doesn't recognize my real screen resolution, 1920x1080 in Windows 7 and Ubuntu 12.04 LTS but I only have three option in BT. In System -> Preferences -> Monitors. I have 1280x1024(5:4), 1280x768(4:3) and 800x600(4:3) and I'm still using 1280x1024 (5:4) however my real resolution is 4:3, but my desktop with 1280x7 (HowTos)