Importing .txt script working... but not at all.

Hi all,

I also take time to check to see if my question has been answered but I cannot find anything that matches the issue that I am having.

I am using this:

this.importTextData();

to prompt the user to select the .txt file to import into a fillable pdf document. There are no errors that appear and by the looks of it it works fine. However no data actually imports. Here is the strange thing, if i do the import process manually (Prepare Form -> More -> Import -> change to text files (*.txt) and select the exact same file I tried to in the this.importTextData(); process it works with out any issues and all the data imports.

So I know it is not an issue with the .txt file and that the Text Field Properties Names are fine. Is there something that is wrong with the "this.importTextData();" that is incorrect? 

Any help would be great. Thanks all in advance.