In my map i have a door and spawner behind that the zombies wont spawn berore i open the door but they wont spawn even after that.... it shows in radiant a yellow line between those so.....

You should link the zombies to zones rather than doors.

Yes but if i have like two rooms which has two spawners in it and after that door i have one spawner i dont want that they would spawn only in that one room...

I think he may have followed the tutorial for the old version, not 1.4 maps. I think someone told me 1.0 maps dont have zones, the zombies activate when you open a door? I could be wrong

http://ugx-mods.com/wiki/index.php?title=Creating_Zombie_and_Dog_Spawners#Linked_to_Triggers

you should probably follow this instead and use zones like Stevie said:

http://ugx-mods.com/wiki/index.php?title=Video_Adding_Risers_1.4

That linked to trigger was very helpful thanks!