Try removing all PCI cards and just have the AGP card in and see if that works.
2 This device cannot find enough free resources that it can use. If you want to use this device, you will need to disable one of the other devices on this system. (Code 12) Two devices have been assigned the same input/output (I/O) ports, the same interrupt, or the same Direct Memory Access channel (either by the BIOS, the operating system, or a combination of the two). This error message can also appear if the BIOS did not allocate enough resources to the device (for example, if a universal serial bus (USB) controller does not get an interrupt from the BIOS because of a corrupt Multiprocessor System (MPS) table).
You can use Device Manager to determine where the conflict is and disable the conflicting device.
On the General Properties tab of the device, click Troubleshoot to start the troubleshooting wizard.