请各位高手给解决一下

在nios ii中编译通过了，进行硬件仿真的时候出现的问题为：
Using cable "USB-Blaster [USB-0]", device 1, instance 0x00
Pausing target processor: OK
Reading System ID at address 0x01804128:
    ID value does not match: read 0x3A02402B; expected 0x55E07EB4
    Timestamp value does not match: image on board is older than expected
    Read timestamp 20:21:59 2011/08/23; expected 15:26:35 2011/09/26
The software you are downloading may not run on the system which is currently
configured into the device.  Please download the correct SOF or recompile.
Restarting target processor
请各位高手指点一下，这个问题该怎么解决？