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that's one possibility, if I draw the line again, but i dont want (its a long animationn). i had use an effect for that in the fx stack. i cant find him. im very sure, that there is an effect for that.

maybe somebody know it

If it was an FX, it probably was Color Replacer...

OK, more information needed.

Are the lines of the wrong colour on a separate layer all by themselves? Then it's easy: "preserve transparency", draw a filled rectangle with the correct colour all over the frame, undo, select all frames, re-apply.

can you explain me,please, how it work. Fx color replacer:the first color is black, the second color i have change white. but nothing happens. where i make a mistake, the color doesnt change

Can you show a screenshot with all you interface ? You probably disable something or you are not placed on the good layer