What windows version driver did you use and what version WindowsPE you use? Did you redeploy your PXE representatives after adding the storage driver?
We used the Dell Windows 7 x64-Bit drivers and created a USB Boot media stick to keep testing with.
After further research we have updated the Windows PE drivers to Windows 8 x64-Bit drivers for use with 9.5. But we are still unable to load them by the looks or see a hard disk for this model device.
We do see this when PE first comes up...
[LDDrvLoad]: This is not a valid folder name, cFileName = .
[LDDrvLoad]: This is not a valid folder name, cFileName = ..
[LDDrvLoad]: Driver Folder List is empty
[LDDrvLoad]: Fail to get Driver Inf File List