Hi Leopoldo, If you install CADian 2008i instead of CADian 2008, 1. Please remove current CADian at system in advance. 2. Connect to webhard. -------------------------------------------------------------------------------- - http://www.webhard.net/member/ ( id = xxxxxxx , password = xxxxxxx ) * ID and PW was sent to your email. - Location : Home > Guest Folder > Download Only > CADian - Commercial > CADian2008i Pro > English > CADian2008.exe 3. Download this file and then install it 4. Use your current serial No. while installing CADian 5. Enter current authorized code after execute CADian. If no information , please refer to the description below. (If not remember your id and password, please let us know your serial No. without followings) (If you replaced your system or formatted your system, please let us know your serial No. without followings) . Enter your id and password at [Returning Customer] after click http://www.cadian.com/english/product_snregist/product_regist.asp . You find [ Additional Registration ] [ Customer Information ] [ Profile Update ] and [ Product Information ] buttons. . Select [Product Information] at the end. . You find your Authorized code per each serial No. . Enter Authorized code at Authorization Window. 6. Now the latest of CADian will be executed. Please do not hesitate to contact us if any queries. Regards, Paul Park Intelli Korea