? in URLs

[eluser]pgsjoe[/eluser]
I apologize if I missed where this was posted already or if it's in the User Guide, but I seem to have run into a slight problem here. Got my entire company's website up and running using CodeIgniter...it's beautiful. But now, they want me to implement some snippets of code for this Web Form Tracking software (it does more than Google Analytics, so NOT using their service isn't really an option) and the company has come back telling me:

"the snippet of code that we need to have on your site needs to allow for the '?' symbol. However, I noticed when I tested your Web Tracking that your code does not allow for this character. In order for web tracking to work, you’ll need to allow for this character."

Are there any solutions to this problem? I'm still fairly new to CodeIgniter, so I'm not sure how to handle this. Thanks in advance.