help about motion tween please!!

[hmtpn]

hello from Turkey, i am a new flash learner. i was just trying to practice what i learned about motion tweening, i followed some tutorial that i have followed before (i am drawing a basic shape, converting it to graphic symbol, and inserting a keyframe where i want my tween end....as i was doing before), but this time in the timeline it does not show a straight arrow but a dashed one. when i ctrl+enter, i see that motion tween is working but why does it show as if there is an error.
P.S. when i right-click on timeline and remove tween there and add motion tween again, then it shows the arrow as it should... kind'a weird :(

thanks in advance

[hmtpn]

soooooo sorry everybody, for posting the above question before looking at my problem long enough. i saw that my stroke color is set to white, not 'none', but i was just selecting the fill to convert to a symbol... that was why it was acting weird. Flash needs a lot of attention ;)