ATC and Navigation Log Dissagree

I am running FSX with XP SP2, have noticed a disparity betweeen AMD Dual Core CPU, 160 GB HDD,nVidia 9500 GT Video Card,and 2GB RAM. I have entered a flight from Sydney,NSW,Australia to Hobart,Tasmania,Australia using FREE FLIGHTS. I take off from Sydney on runway 34L (As per instructions) and soon aafter take off ATC gives me the instruction to turn right on a heading of 95. Soon after I am instructed to turn right heading 155 then there are no more navigation instruction until I reach Tasmania. The GPS however tells me to head 195 degrees which causes ATC to instruct me to expedite my turn to 155.I do turn to 195 and ATC seems to accept this after a while.Upon reaching Tasmania I am informed that I should receive vectors to land on runway 12 which is the opposite direction to that given on the Navigation log which is 299 degrees. Can anyone assist me to correct this. Is it a corrupt load of the software, a corruption after the software is loaded, or a glitch that exists in the software. I have given as much detail as I can so could somebody with FSX SP2 loaded run the flight and let me know whether or not they get the same anomlies. Thanks for your patience normael