I resolved the wireless mouse recognition problem by turning off Bluetooth in Leopard and turning on Bluetooth device in VM. But one big follow-up problem is that I cannot type anything in Password field of XP login window. It seems the keyboard doesn't work at all.
BTW, my MacBook at above problem has 3 Windows partitions (the first 3 partitions from the top down in Disk Utility) and 3 Mac partitions. I install Windows XP in the 3rd partition. And it can start and run normally via Boot Camp.
Actually, when VMware Fusion prepared that XP partition for VM, it said that it might not start Windows XP in Boot Camp partition, then that problem appeared after starting VM for Boot Camp partition.
In addition, my MacBook in office has 1 Windows partition with XP installed (the 3rd partition from the top down in Disk Utility) and 3 Mac partitions, but this XP install works well with VMware Fusion.
So is the problem caused by additional Windows partitions?