Unfortunately I would use the paid converters if I was able but this is something that we are only able to use VB.net for.
I am unable to upload any samples of the documents or errors I can only describe them.
I have since worked out a way around this, I was able to convert the document, using Word 5.5 but it has lost some formatting of the document.
I am in the process on attempting another solution, I will post again if I have any luck.