[SOLVED] error in HFSS installation

Hi.
I installed HFSS 13 and 12 and 11,but I receive this error:

Failed to check out license 'hfss_desktop'.
Invalid (inconsistent) license key (FLEXlm Error -8)

How solve this problem?I was installed and used from HFSS 13,about one year ago,without any problem in installation.
But now I will receive above error.
why?
how solve this problem?
thanks

my problem was solved.
if you have this problem,also,you have to do following steps:
if your installation is not work,you sure that you have to do "4" and "5" steps only.
1- sure that your installation steps are true.
2- copy/paste "license file" to "admin" folder in your installation path.
3- copy/paste "patch" and "Ansoftfix.exe" from your HFSS source to installation path.
4 - you have to run "patch" and "Ansoftfix.exe" as "Administrator" only.namely right click on them and set "Run as Administrator".
you have to first run patch and next run Ansoftfix.exe.
5- if again your installation doesn't work,you have to choice a path instead of "windows hard disk drive".for example you have to install your HFSS in "D" drive instead "C" drive.

sure that your HFSS will work...
ghasem

Most important is that u have to run as"Administrator"

hi.
I installed hfss 13 in windows 8 but it showing the error failed to checkout license 'hfss_desktop'.no such license exist (FLEXim Error-5).
ansoftfix.com is not there after extracting the rar but while i opened rar file in there the ansoftfix.com is there but after extracting it is not there pls help me to rectify this problem