http://www.zwsoft.com/forum/viewthread.php?tid=1549 Hi, Go to your license manager (START->ALL PROGRAMMS->ZWCAD) and check your license status. What does it say ? Is the license activated or not ? You could deactivate it by returning online and register it from an admin account on your computer. Otherwise it can loose the activation. zw_admin 2010-04-13 22:45:09 http://www.zwsoft.com/forum/viewthread.php?tid=1549&pid=12418 here are some tips for your reference: <a href="http://www.zwcadclub.com/forum/forum_posts.asp?TID=15" target="_blank">http://www.zwcadclub.com/forum/forum_posts.asp?TID=15</A> the Topic 3 hope it will be useful zw_admin 2010-04-16 13:49:59 http://www.zwsoft.com/forum/viewthread.php?tid=1549&pid=12414 <SPAN lang=EN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Verdana; mso-ansi-: EN">That is what is displayed about my license naw<?:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN> zw_admin 2010-04-15 22:38:13 http://www.zwsoft.com/forum/viewthread.php?tid=1549&pid=12413 <img src="http://classic.zwcad.org/forum/uploads/20100415_223359_licence.JPG" height="1024" width="1280" border="0" /> zw_admin 2010-04-15 22:34:47 http://www.zwsoft.com/forum/viewthread.php?tid=1549&pid=12394 <P =Msonormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hello,<?:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN> <P =Msonormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN> <P =Msonormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I heave a problem with my license for zwcad Professional 2009, few days after I use response.XML file to register license the software comes back to initial state of trial version, it passed more then 30 days and normal it should expire that don zw_admin 2010-04-12 22:31:12