A few suggestions:
1) Update your virus definitions. Depending on the scanner, this may fix the problem.
2) Norton 2005 misinterprets the code as a trojan, so if you have that, you need to turn off the script checker. Look at the Norton 2005 sticky post for more information. Go here:
3) If the scanner you're using has a script checker (as mentioned, Norton does and McAfee does as just two examples), turn it off and see if that helps.
4) If you are using a scanner that is not common, you can either change to a more common scanner, or you can contact the maker of it and ask them to update their virus definitions to not detect Invision.
Note that the script checking in virus scanners is a useful *idea*, but in practice, it usually causes more problems than not having it. This is especially true if you run mIRC or any other program that uses scripts. A simple backup script can trigger your virus scanner's script checker because it's making a copy of something and saving it. I've had my scanner delete my script that I used for backing stuff up for that reason. I quickly decided that script checker was a bad idea.
