forgoden

hello, ive bought AvTech AVC761Z-B from ebay. There were no CD in package so where can I get the software AVTech AP ? and why are the video views too bright? Too much blending, i cant see any persons. Ive adjust the brigthness, contrast etc but it doesnt help. I am sure, its not the camera, because i've testet it on other device. Also testet with different cameras. all the same results. thanks