Well.. if you used 'my' .config without througfully modifications acording to your hardware, could be the reson of your mouse not working, but here is some hints.
My USB is: UHCI (this is in the USB section of the kernel)
You need to see what yours is (UHCI or OHCI) if any.
USB HID Boot Protocol drivers (NONE checked)
What about the BIOS support ? did you modify acordly to your hardware ?
This is in: Device Drivers > Mapping drivers... > Intel....
G... the list can be long
You have intel or AMD ?
If I had full specs from your comp, I coul prolly tell you the necesary modifications.