360 grenade ?

A completely custom movement is better.
Here's how to do it:
Make a grenade object with 4 Alterable Values: XPos, YPos, Velocity and DeccellerationSpeed.
Oh and one more, lifetime. Lifetime is how long you want the grenade to be active before exploding.
Set DecelerationSpeed and Lifetime in object properties to whatever. 1 second is 50 frames by default, so by default, set lifetime to 50xNumber of Seconds Active.

Then add this event in the main event editor:
-User clicks-> Clicks with Left Button:
*Create Object ("Grenade")
*Grenade->Alterable Values->Set->XPos to X("Player")
*Grenade->Alterable Values->Set->YPos to Y("Player")
*Grenade->Scale/Angle->Set Angle to Angle("Player")

Then in the behavior of the Grenade (Under Events tab in properties) put the following two events:
-Always:
*Grenade->Alterable Values->Set->XPos to XPos("Grenade")+(Cos(Angle("Grenade")*Speed("Grena de"))+0.0
*Grenade->Alterable Values->Set->YPos to YPos("Grenade")+(Sin(Angle("Grenade")*Speed("Grena de"))+0.0
*Grenade->Alterable Values->Set->Speed to Speed("Grenade")-Deceleration("Grenade")+0.0
*Grenade->Alterable Values->Subtract From Lifetime 1

-Grenade->Compare to Alterable Values: Lifetime<0:
*Grenade->Destroy.

EDIT: Also, take out the movement and put static instead.

Why is that better? The Vector Movement works just as well, and is much simpler than using math for a custom movement.

Still need help :/ can you guys look at my GRENADE section of the event editor? thnaks...
http://mfa.aquadasoft.com/view/1294346428-Help3

Right off the bat I can see that you're not even using the Clickteam Movement Controller at all, so it's definitely not going anywhere. Refer to Jaffob's post.

but i tried that and it didt work either

You're going to need to give your grenade the Vector Movement in its properties. ;)

I know but it still.didnt.. Please give me an example?

Dude. You used speed instead of your alterable value. That's all it is. Just go to your behavior. Replace speed("Grenade") with velocity("Grenade").

EDIT: And in reply to Jacob, my way is "better" because it can be transferred to other programming languages/game makers.

EDIT2: I looked at my post. It was my mistake. Sorry man.
EDIT3: Sorry, also add these two events to your behavior under always:
Grenade->Set Y Position->YPos("Grenade")
Grenade->Set X Position->XPos("Grenade")

EDIT4: Forget the rest of it: Here's your example fixed:
http://www.clickteam.com/epicenter/ubbthreads.php?ubb=showflat&Number=219160&#Post219 160