Please perform following steps.

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• Create a fresh Virtual machine with  custom SCSI controller. (Keep Floppy drive configuration)
• Extract the downloaded driver symmpi_wXP_1201800.zip (version 1.28.03)
• The driver floppy image can be pointed by editing VM, floppy.
• Initiate Windows XP installation, press F6 when asks and and point to the driver in the floppy
• Continue and complete the installaton.
• Now use this VM as a parent VM, and it should solve your problem