How to crack flex4 serial number failure

Use NotePad to edit the hosts file under the "C: \ Windows \ System32 \ Drivers \ etc \" directory, and add the following at the end:
127.0.0.1 activate.adobe.com
127.0.0.1 practivate.adobe.com
127.0.0.1 ereg.adobe.com
127.0.0.1 activate.wip3.adobe.com
127.0.0.1 wip3.adobe.com
127.0.0.1 3dns-3.adobe.com
127.0.0.1 3dns-2.adobe.com
127.0.0.1 adobe-dns.adobe.com
127.0.0.1 adobe-dns-2.adobe.com
127.0.0.1 adobe-dns-3.adobe.com
127.0.0.1 ereg.wip3.adobe.com
127.0.0.1 activate-sea.adobe.com
127.0.0.1 wwis-dubc1-vip60.adobe.com
127.0.0.1 activate-sjc0.adobe.com

Start FLex Builder and enter the serial number. Then you can use it normally.

1424-4118-1138-0912-4001-7222-
1424-4012-2754-1802-2619-8928-
1424-4766-4350-7925-0705-3050-

Http://niweiwei.iteye.com/blog/1104639