Upgrade Trigger

ok im trying to get it to upgrade when you have 5, 10, 15 kills and such , i have the region "upgrade"

event
_________

Unit - A unit enters Upgrade <gen>
___________
condition
->(Unit-Type of (triggering unit)) equal to rifleman
->kills(Integer A) Greater than or Equal to 15
____________
actions
->Remove Triggering Unit from game
->create 1 Sniper for (owner of (triggering unit) at (center of upgrade <gen>) facing default building facing degrees

it doesnt seem to make the new unit

I am assuming that kills is a custom (integer) variable array that you made, and a trigger causes it to go up every time a unit is killed, with the array value being the player that owns the killing unit.
If so, then then
kills(Integer A) Greater than or Equal to 15
should be
kills (Owner of (Triggering Unit)) Greater than or Equal to 15

For anyone who doesn't know what I'm talking about in the top part, then here's how to do a kill counter (There may be easier/better ways, but I haven't needed to find out yet):

Events
Unit - A unit owned by Player 1 Dies
Unit - A unit owned by Player 2 Dies
Unit - A unit owned by Player 3 Dies
.... for every player in the game
Conditions
(Owner of (Killing Unit) Not equal to (Owner of (Dying unit))
Actions
Set Kills[(Player number of (Owner of (Killing unit)))] = (Kills[(Player number of (Owner of (Killing unit)))] + 1)

The condition is there so lamers don't kill their own units for points.

how do i make this trigger
kills (Owner of (Triggering Unit)) Greater than or Equal to 15

its not boolean compairsion is it? and get detailed =\

It's an integer comparison. Like you already have; just change what's in the brackets to owner of triggering unit.

kills (Owner of (Triggering Unit))current gold]) Greater than or Equal to 15

it says that but with the current gold shit , cause i used
player-> player property

is it ok that way or no

Use player number, not player property. And in there, choose "Owner of Unit" in the drop-down box, and choose "Killing Unit". If you are having trouble still after doing this, you may want to use the other stuff I put at the bottom of my first post.