hi all , after update my rb133 by netinstall, software ID was changed and license was lost please help me to get one.
when you ran netinstall, did you accidentally remove the licence key from the screen, where it says “Key:” near to top right thus effectively telling it to remove it? If so, too late now of course, but never do that. 
If you give an email to support@mikrotik.com with your software ID, they can send you the correct matching licence key and you can then paste the text you send you back into the running routerboard via telnet or winbox.
Switch it off as it will make even more difficult for you after 24 hours of usage. So if you switch it off after playing with it for 1 hour today, then next week you still have another 23hrs to play! It only counts down with ‘uptime’ but does not when switched off.
thanks , I will sent software ID to Mikrotik support
solution to your problem is here in this thread http://forum.mikrotik.com/t/lost-license-after-upgrade/53014/1
Yeah, I already tried that, but it didn’t work, it said the key was not found. Which is why I suggested he contact Mikrotik as best solution. 