系统生成器无法连接到许可证管理器

你好！
我试图通过系统生成器生成FFT的组件。
我浏览了.mdl文件中的Stystem Generator块，但是当我尝试生成时，我收到以下错误消息。
我不明白为什么它无法连接到许可证管理器。
我已经通过浏览器中的导航尝试了％XILINX％变量，它是正确的。
输入％XILINX％ lib  nt64时，至少我会找到正确的路径。
我也有许可证，可以毫无问题地启动ISE模拟和综合。
有人可以向我解释有什么问题吗？
---------------------------------版本日志---------------
------------------- Version PathSystem Generator 12.3 H：/Xilinx/12.3/ISE_DS/ISE/sysgenmatlab 7.12.0.635（R2011a）C：/ Program Files / MATLAB / R2011aISE
H：/Xilinx/12.3/ISE_DS/ISE ----------------------------------------
----------------------------------------错误摘要：错误0001：错误：A
System Generator的许可证签出失败...阻止：未指定-------------------------------------
-------------------------------------------错误0001：报告人：UnspecifiedDetails
：错误：System Generator for DSP（SysGen）的许可证签出失败。无法联系Xilinx许可证管理器。
请检查以下内容：（1）XILINX环境变量指向有效的ISE安装（2）％XILINX％ lib  nt64在PATH环境变量上----------------
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以下为原文

Hello!

I am trying to generate the component of an FFT through system generator. I went through the Stystem Generator block in the .mdl-file but when I try go generate I get the following error message. I do not understand why it cannot connect to the license manager. I have tryed out the %XILINX% variable by navigation in the explorer with it, and it is correct. At least I will come to the correct path when typing %XILINX%libnt64. I also have the license and can start ISE with simulation and synthesis without any problem. Could someone please explain to me what is wrong?

--------------------------------- Version Log ----------------------------------Version                                 PathSystem Generator 12.3                   H:/Xilinx/12.3/ISE_DS/ISE/sysgenMatlab 7.12.0.635 (R2011a)              C:/Program Files/MATLAB/R2011aISE                                     H:/Xilinx/12.3/ISE_DS/ISE--------------------------------------------------------------------------------Summary of Errors:Error 0001: ERROR: A license checkout has failed for System Generator...     Block: Unspecified--------------------------------------------------------------------------------
Error 0001:
Reported by:  Unspecified
Details:ERROR: A license checkout has failed for System Generator for DSP (SysGen).
Failed to contact the Xilinx license manager. Please check the following:  (1) The XILINX environment variable points to a valid ISE installation  (2) %XILINX%libnt64 is on the PATH environment variable
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