Cisco Firewall :: ASA5505 Multiple Public IP NAT

I have three public IP:s from /24 network like 83.x.x.10, 83.x.x.25 and 83.x.x.41 all using netmask 255.255.255.0.

I'm using 83.x.x.10 on ASA outside interface and trying to do static nat for inside servers with those other IP:s, but not yet solved it.
 
Using Cisco ASA 5505 software v9.02
 
Config:
object network obj_guest
nat (guest,outside) dynamic interface
object network obj_any
nat (inside,outside) dynamic interface
object network w2008
host 192.168.1.10

[code]....

This works other networks that are like whole network with /29 mask and have router in front of ASA using bridge. But in my case i just have DSL modem bridged in front of ASA. This static nat works like should if i use like Zywall USG series fw and this same configuration works in my customers, but they have those scenarios i said having mask /29 and router in front...
 
It seems that the problem is in ASA, like i won't show those public IP:s to public router from my operator. Because if i roll those other public IP:s on my ASA:s outside interface: i will use 83.x.x.25 and 83.x.x.41 on outside interface and after that put back my original 83.x.x.10 then my static nat is working just fine, atleast few hours, but not in next morning because ISP router flushes ARP cache.