A model number may be useful.

By running I am assuming that the compressor is running usually you can hear it also you should be able to feel it vibrating and it should be warm.

Check that the evaporator (freezer) fan is running.
If not that may be your problem.

If the fan is OK then remove the rear cover in the freezer so you can inspect the evaporator coils.

If they are heavily iced/frosted over you have a defrost problem.

If there is no frost or frost only in one area (usually where the freon enters the coils) then you have a sealed system problem and it will be an expensive repair as you need a pro.
Make sure to check it after the unit has run a couple hours because if you do it shortly after a defrost cycle there will also be no frost.

First remove the evaporator cover in the freezer so you can see the evaporator coils.
Do not let them de-ice.
If they are heavily iced/frosted over you have a defrost problem.

If yes.
Manually force a defrost cycle by turning the defrost timer cam till the fans and compressor turn off.
I think it is in the fresh food section controls section. There is usually a hole to let you turn the timer cam.
Now check the defrost heater to see if it is on.
Be careful you do not want to burn your fingers.
If the heater is on then the timer needs replacing, re: it is probably stalling during it's rotation so is never getting into a defrost cycle.

If not on.
Unplug the unit.
Remove the wire for one side of the heating element from the wiring and measure it for continuity, usually around 20 ohms or so.

If the heater is OK
Remove one wire to the defrost thermostat and measure it, should be 0 ohms when frozen. Note that it opens just above freezing so must be frozen to check it. Also inspect it, if it is bulged at all replace it even if it measures OK.

If both the above are OK then odds are the defrost timer contacts are toast.
Best way to test this is a live test to see if you have 120 volts across the heater/defrost thermostat combo.

[COLOR="DarkRed"]i cleaned everything that you can but nothing has changed/.. what else is left to do or how do i fix this??[/COLOR]
It does not sound like you removed the cover at the back of the freezer so you can inspect the evaporator coils so I cannot be of much help.
If you go to the Sears Parts site and search your model number they have a parts breakdown which will help you locate things.

Here is a site with good basic fridge repair info perhaps it will be useful.
http://www.applianceaid.com/frig.html

ok i took back wall off in frezzer part.. cant see coil part or metal parts cause ice covered it.. so how do i figureout what is bad and or good??? help..:(

i reset it and turned t off and i didnt really hear anything but not sure hwere to check and see if it is running? what part do you check?
. and how do i check t see if motor is running can u hear it or ? very stressed... cause you can hear fridg running ..