This ...
You seem to define a variable for Word interop and instantiate it immediately. Have a look at line
Dim myMSWord As New Word.Application
If you take out New keyword, the creation should not happen anymore. The same applies to the document.
Plus this ...
since the Word instance isn't created in the beginning anymore, you need to create it in the code before using. Consider the following.
myMSWord = New Word.Application
... has resolved my problem, many thanks to Mika Wendelius for his help :-)