System error 53 when booting to PXE and trying to map to the F drive

Has anyone seen this issue on RDP 3.8 Altiris DS 6.9?

I am unable to map to the DS share drive when after booting my target server (ProLiant DL380G5) to Winpe 2.1.

I am getting System eroor 53 has occurred.
The network path was not found. The system boots to X: drive which is the ramdisk where all the WINPE files are. I can ping the deployment server from the command line. BTW, I do have LMHOST file setup in my bootimage file.
I don't have this issue when booting from Linux image.

My RDP version is 3.8.