Trying to use C to open a shared file in my win7 PC

I just purchased the Deo Nano SoC and I am trying to understand its speed for different tasks. I wrote some loops in C with some output to screen and I was impressed. Now I want to read data from a shared file from my win7 PC. In my C code, I have the tried variations of the following line of code with no success.

fp = fopen("////169.254.5.152//temp//test.txt", "w+");

I use make and scp to transfer to the Soc

When I run

root@socfpga:~# ./my_second_hps

I get the following:

Segmentation fault

My "temp" folder in "c:\" with State: Shared

The IP address is that of my PC

What am I doing wrong?