Hi My freind give me a Autocad 2005 CD, I installed on my windows XP with a serial number: 999-99999999. It can be used for about a month, then stoped. Each time I start the Autocad, it asked to get reactivation number. On the CD there is keygen progremm. 1. Do I have to install the keygen progrem into my PC then I can use it, or I can use it running on the CD? 2. As I start the keygen, There are 3 line: First: "Reguest code". What this mean? where can I get it (online) or on the autocad I used? I do find a code something like: JQRY 8Z3R 10EJ A9F9 9VKQ TLL3 DEUK. BUT after I put the code into the "Regust code" line, no thing happened, and no any button let me to get the activation codes. 3. The second space called "Activation code": There is a line in it: "Requestio code incorrect". 4. The third space called activation type: "Request code incorrect". Nothing more, What can I do for this? Please help?