Snagit - Doesn't work


I read the comments in this article. Downloaded SnagIt 7.1.0. Captured a Real Video for a few seconds. But in the preview window all the frames were black. I created a file test.avi but it won’t play in Real player or Windows Media Player. I also tried divx player but it gave me the error that I need FOURCC code “CRAM”. I also downloaded the TSCC codec from the techsmith website, but still I have the same problem. Can someone help me to get rid off this problem?

Also how can I change the codec for output file to be divx?

Thanks in advance.