Loader stalls and no loop

Loading prob with F5 - loader fails to loop 15 frame mov until frame 230 loads. It appears to work fine locally - but when I put it up and stream back - it stalls, no load mov and screen is blank while entire sequence is loaded. I’m occassionally getting the action script “load-clip” when I put in the basic “if load then” on the mov symbol. It just won’t loop while rest loads. Also, is load from “top” first in settings mean the lowest in the layer seqeunce or visa versa. Meaning priority is given to the lowest placed items of the layers, and upper layer items are behind the priority order layers below. or ?
thanks. beginner j