Booting issues with IOPCCardBridge

I was finally able to get Leo installed on my laptop with the Rev2 dvd. I have my it dual booting with GUID and Vista.

I am now having problems with booting into Leopard.
I select it in the boot menu and it starts.
When it starts, I get very little movement with the loading circle (i would chalk this up to Leo not recognizing my laptop mouse/keyboard).
After a few seconds, I get a grey circle with a line through it above the apple logo.

After booting with -v the system tells me that IOPCCardBridge failed.

Any suggestions?

I have an ACER Aspire 5050:
AMD Turion 64 X2 TK-53 1.7GHz;
4GB (2/2) DDR2 667 SDRAM;
120GB hard drive;
integrated Super-Multi drive (DVD+R, DVD-R, DVD-RAM);
integrated ATI Radeon™ Xpress 1100 graphics;