Loop In Animation Is Not An Option

Hi,
Trying to build the menus
I have a circle (button) that I want to rotate endlessly yet I can't use the loop option
Why ?

 

Are you trying the animation in the open? you need to do it in the idle as well then it will be continuos.
So the process is, do the animation in Open, then do it again in idle.
Hope that makes sense..

 

@eyal
In idle you can then click on Loop and it will work....

 

thank you for that, but even though I used it in idle, and put a rotation, it still worked for only 30 frames and stopped. here it works great

 

@eyal Not sure, it works fine for me, it loops great.
Are you deleting the excess frames that are not used? Clicking the Loop?
Don't know what else. Sorry man...