Printing a Richtextbox content into crystal report

Hi,
I am very new to crystal Reports. I want to type approximate of 20 lines in a RichTextBox and I want to export these text to Crystal Report to convert this page as pdf document. I have used parameter passing technique. If I have entered more than a line, crystal report viewer shows an error like this

?Error in formula

?LINE 1
?The matching for this string is missing. Plz give me a solution .