You are running the free version which is limited to 30 seconds, if you are a registered user contact them.
i've tried every available option in FRAPS, checked and unchecked every box i saw, but i still can't get FRAPS to record anything longer than 29 seconds. it just randomly stops recording, nothing was pressed, nothing changed, and its not an average of 29 either. i have 37 vids that i've made in my attempts to solve this problem. all of which are 29.14 seconds long. is there a hidden setting that i'm unaware of? or is the answer right in front of me and i'm just missing it?