Tesla C1060 on XP 64 bit

Hy, I tried to customize a DELL Workstation (DellPrecision) on the DELL Website but I get an error message telling me that Tesla Card C1060 can be used only with 32bit operating system and I need to have a 64 bit in order to get more than 4Gb RAM. In fact, the specifications for the C1060 confirm that this card can be used with either 32 or 64 bit operating system. SO what’s wrong here???

There’s nothing wrong with C1060 and XP64 (I have run it myself extensively). I’ll ask around.