If you manually do a directory listing of \\SYSWBHLCS001\ldmain\landesk\files\drivers does it show a directory listing?
Can you try to map a drive to that location and see if it will map?
Do you have a C: drive if you try to go to it? I assume you went to X: and ran notepad?
If you don't have a C: drive I would suspect that your Hard Disk drivers are not the correct drivers in the WINPE image.
However I have since resolved this issue.
Can you share how you resolved this if you recall?
I needed to repoint the client to the preferred server/PXE rep to get the driver files rather than the core server, which is what was listed in my screenshot.
I cannot recall the exact details, apologies.