Cisco Firewall :: ASA Twice NAT (port Translation) - 8.4 In Depth?

I have some issues with Twin  PAT on ASA (8.4.2), there is sth I dont udnerstand FTP server is on the inside and client is in outside.
 
I did sth like this

object network NATED-11
host 20.20.20.11
object network REAL-2
host 10.200.200.2
object service SRV-FTP
service tcp destination eq ftp

nat (outside,inside) source static any any destination static NATED-11 REAL-2 service SRV-FTP SRV-FTP so teoretically there should be a problem in NAT cause there is a second channel for data etc. BUT according to docs "For applications that require application inspection for secondary channels (for example, FTP and VoIP),the ASA automatically translates the secondary ports."
 
The problem is that it doesn't work at all and got the syslogs

Debug on ASA shows
 
ASA5510(config)# nat: untranslation - outside:20.20.20.11/21 to inside:10.200.200.2/21
nat: untranslation - outside:20.20.20.11/21 to inside:10.200.200.2/21
nat: untranslation - outside:20.20.20.11/21 to inside:10.200.200.2/21
nat: translation - outside:20.20.20.252/37924 failed - port is not found in xlate(0-0)

[code]....
 
To make it work I need to modify the nat rule to sth like this (translate source of client to inside inteface of ASA) nat (outside,inside) 1 source static any interface destination static NATED-11 REAL-2 service SRV-FTP SRV-FTP / why its not working in the first place? aaa I forgot to mention that both modes of FTP were tested (passive and active)