[求助]ANSYS12.1安装时认证

我安装了ANSYS12.1，并且安装成功了。能使用。
但是重起电脑后就不能用了，说认证没有通过。
我运行Server ANSLIC_ADMIN Utility中的Start the ANSYS.Inc License Manager
也不行。再次用stop the ANSYS.Inc License Manager下，再点
Install the License Wizard和Start the ANSYS.Inc License Manager也不行。不知什么原因。
运行了后是：
Welcome to the Server ANSYS, Inc. Licensing Administration Utility
Installation directory: C:\Program Files\ANSYS Inc
Dec 01, 2010 18:58: Attempting to start the ANSYS, Inc. License Manager...
This may take a few seconds; please be patient...
Start the ANSYS, Inc. License Manager status:
The ANSYS, Inc. License Manager has successfully started.
Please note that it may take up to 10 minutes for all components of the
ANSYS, Inc. License Manager to be fully functional. If after that time the
ANSLIC_ADMIN Utility's status window shows any particular component
of the license manager as not running, please examine the ANSYS
Licensing Interconnect debug log file and the ANSYS FLEXlm debug
log file (by clicking 'View Status/Diagnostics Options' button) for more
information or possible errors.
左边 是：
ANSYS, Inc. License Manager status:
Licensing Interconnect: not running
Licensing Interconnect Monitor: not running
FLEXlm: not running
我把证书服务卸了再安装，还能用，但是只能用一次。一重起电脑又不能用了。还要重装。这是什么原因。希望大侠帮忙指点！！！