I am setting up a 3d set at my home. I have 2 exactly same projectors of Projector Design F1+ Series with 2 polarize filters. Cyviz xpo.2 which is a Stereo 3D Converter which i don't know how to use. Have a 2.8GHz Xeon with Nvidia Quadro FX 3450/4000 SDI graphic card. I also have a huge silver screen.

The problem is that i have almost made the projectors aligned on top of each other. And i am unable to understand that what should i do. I have Spent 2 weeks on it with no success.

Plzzz help me

Hey as far I know you need "keystone correction" ~ vertical lens shift.
Plus iz3d.

I know none of this stuff. But we can chat about your sound sytem if you want

Hi and welcome!
I got a passive projection rig myself and i'm sure the problem can be found.
Do you know what kind of polarizers you use for your projectors and glasses? You can't mix circular and linear (actually can by turning/rotating etc, but one thing at the time). The best to use is linear because of less ghosting. Using linear you can't tilt your head without loosing separation. This is not a problem because the brain maintains the best stereopsis by keeping the head straight horisontal aligned anyway.
I'm not sure how to use the stereoconverter you have so leave it for future experiments and connect both projectors to your computer, each projector needs one separate output.
Configure your displaydriver so the projectors works as two independant displays (extend desktop on one of them).

Iz3d-driver:
Download the iz3d-driver. Deactivate any antivirusprograms since some might interfere with during the install. Make sure you choose full install to get all outputoptions.
Open up the iz3d-control center, choose "enabled by hotkey" below directx tab and dual projectors as output. Press apply.
Go to the helptab and push the iz3d-logo (dynamic test). You should see the spinning "something" in both projectors.
With numerical + and - you control stereodepth (separation) and with [shift]+[+] and [shift]+[-] you control the convergence. Play around with it to see what the settings does. For gameplay, start your game and press numerical * to activate stereo. Stereocontrols are the same as for dynamic test.
If the image ghosts you probably have unmatching filters (polarizationangles or mixed polarizers) so tell what kind of glasses you have in this case and if possible even the filterpolarizers.