I haven't seen it mentioned here yet, but after doing middleware checks on the server it appears that 22.rocketiptv.tv is not compliant for MAG 256 as it is currently on Stalker Middleware 5.0.1.

Code:
11.iptvrocket.tv = http://portal.iptvrocket.tv/stalker_portal/c/version.js
= var ver = '4.9.22'; (Stalker Middleware 4.9.22)

Code:
22.iptvrocket.tv = http://portal.iptvrocket.tv/stalker_portal/c/version.js
= var ver = '5.0.1'; (Stalker Middleware 5.0.1)

So everyone who has a MAG 256 in theory you shouldn't have any issues using your unit on Rocket 22