Thats a really old thread you are breathing into life there:)
I wonder if anmabagina ever figured out the problem..
However I was thinking that using a serial analyzer tool on the windows pc might help. It shoul tell if if there is anything going on at the windows serial port.
I just googled it, so I havent tested this program. But I was thinking about something like this
https://freeserialanalyzer.com
