Serial key:
1325-1219-6577-0281-6152-5368
1325-1847-3144-5390-5793-8364
1325-1681-9407-0514-1931-7620
1325-1552-2004-4692-8175-4860
1325-1666-5391-4164-0078-5535
1325-1383-1531-8755-8122-9390
1325-1677-7602-9136-2450-5882
1325-1643-0119-7932-6286-5109
i hope it’d help ^_^
FOR MAC-OS:
Adobe CS5 Master Collection (Volume Serials) with PS CS5 Extended
1325-0150-1163-7532-1626-3430
1325-0178-1927-9019-0123-2254
1325-0702-3693-1544-9166-3515
1325-0549-2240-0071-3409-1342
1325-0621-9125-0765-3648-0614
1330-1927-7762-6383-0202-0414
with MAC, these compounds in the Hosts file (under / private / etc / hosts “registered) Serial:1325-1558-5864-4422-1094-1126
127.0.0.1 activate.adobe.com
127.0.0.1 adobe.activate.com
127.0.0.1 practivate.adobe.com
127.0.0.1 ereg.adobe.com
127.0.0.1 adobeereg.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
127.0.0.1 wwis-dubc1-vip60.adobe.com

here you can add:
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
You also must Delete cache.db if problem, below links:
C:\Program Files\Common Files\Adobe\Adobe PCD\cache
For mac
/Library/Application Support/Adobe/Adobe PCD/cache/cache.db