i burn some avi to dvd and after its says format disc or dis

hi, i am using some verbitam 8x to burn some avi files. i am using cdburner xp pro 3 to burn the files. i have done it loads of times with loads of different files but then when i put in the disk it gives me the message "windows cannot read this disk, it might be corrupted or using a format that is not compatible with windows, i know its not the disk because ive tried so many times, maybe its the program, can someone reccomend a free program to use (not a trial version unless its 30 days and not like 2 copies) or explain what i need to do to burn these correctly or to play them. the writer is a nec 3520AW rw- ND. i havnt got any propblems playing any other disks , e.g dvd or computer games, although sometimes i cannot play a dvd unless conected to the internet

thanks

i think i put this in the wrong section, ill try to delte it and post in another section, might i add its a data disk i am trying to burn, playable on computer

sorry should have specified its a dvd

data dvd

I have used folder2ISO to produce the image and ImgBurn to burn it. It worked for me.

i downloade folder2iso but am a lttle confused, it asks for the folder input and folder out put. i have always used programs that you put programs into a box and it burns them

im reading the guide but what is an iso image, does this convert it to dvd player palyable? i only need it to play on a computer
thanks

Iso image is an image of the disc - it doesn't matter what kind of disc - data or video, or audio, or younameit, cd or dvd. The progies which are burning straight to disc in reality convert to an image on-the-fly.