Help needed with ATI x300 driver

I bought an ATI x300 card for my Lenovo T400 dock, because I needed a short PCIe x16 card.  When I power up my Lenovo T400 laptop on the dock, XP asks for a VGA driver--but I never can get it to work.  I tried to install the ATI x300 CD that came with it, but when I pick the .exe for 32 bit XP and run the ATI install program, it eventually cancels out, saying it cannot find the appropriate hardware.  I also downloaded the driver setup from the ATI site--a file named 9-11_legacy+xp32-64.wdm.exe--and it does complete the ATI install.  But when I run the ATI console, it never sees the x300 card.  And, in device manager, it still shows a VGA device with the yellow question mark.  I have tried to 'update driver' and search for the right driver file--which I assume is an .inf file--but I never can find one that will work. In case it matters, I believe my laptop has ATI Mobility Radeon HD 3400 Series graphics.  This makes me wonder if the ATI software I'm trying to install is having problems due to this. BTW, I feel sure that XP really is seeing this x300 card that's installed in the dock, because if I remove it from the dock, I no longer get the message asking for the drivers, and I no longer get the yellow question mark device in device manager. Any idea what is going on and what to try next? Solution: Help needed with ATI x300 driver You should first install the software and then connect the card.