我自己設(shè)計(jì)了一個(gè)單片機(jī)制作，可是用Proteus仿真時(shí)，出現(xiàn)了下面的話，不知道是什么意思，請(qǐng)高手分析一下啊�。�！

SIMULATION LOG
==============
Design:   UNTITLED.DSN
Doc. no.: <NONE>
Revision: <NONE>
Author:   <NONE>
Created:  06/12/30
MODIFIED: 06/12/30

Compiling source files...
Build completed OK.
Compiling netlist...
Linking netlist...
Partition analysis...

Simulating partition 1
PROSPICE Release 6.7 SP0 (C) Labcenter ELECTRONICS 1993-2005.
SPICE Kernel Version 3f5. (C) Berkeley UNIVERSITY ERL.

Reading netlist...
ERROR: [U1] DSIM MODEL MCS8051.DLL failed to authorize - PRODUCT Key does not
       match Customer Key.
Reading SPICE MODELs...
Loading library 'ANALOGD.SML'
Loading library 'APEX.SML'
Loading library 'BURRBROWN.SML'
Loading library 'ELANTEC.SML'
Loading library 'FAIRCHLD.SML'
Loading library 'INTERSIL.SML'
Loading library 'LINTEC.SML'
Loading library 'NATOA.SML'
Loading library 'SUPERTEX.SML'
Loading library 'TECCOR.SML'
Loading library 'TEX101.SML'
Loading library 'TEX301.SML'
Loading library 'TEX3_1.SML'
Loading library 'TEX401.SML'
Loading library 'TEX5_1.SML'
Loading library 'VALVES.SML'
Loading library 'ZETEX.SML'
Building CIRCUIT...
Instantiating SPICE MODELs...
Real Time Simulation failed to start

Simulation FAILED due to fatal simulator errors.

    不知道是什么問題�。�！請(qǐng)幫幫我。