Modding

I need help resolving an issue.
I created an option to add to the menu, similar to the combat log. In the (WindowTextView) file, there's a "TextFileRef" line with a link to a text file. I placed a large amount of text in this text file. The text is displayed in the option, but the scrollbar for scrolling through the text doesn't work. It's displayed, but it doesn't recognize that the text is larger than what's visible.