The maximum map size WC3 allows to be hosted is 8MB. You will need to remove imports from your map until it fits in that limit. You may be able to save space by compressing music or images further than they already are (of course, reducing their quality, too).
P.S. In the forum rules, it states that you are expected to give your threads descriptive titles, not generic titles such as "please help me", and that you are expected to search for answers before asking a question, and I know that this question has been asked before...