i m 49level wit 99.99 now... i am even clear the quest till 50 level, and ready to 51 level quest, can tell me how to solve my ID to rise 50 level??

have you RMB the item called "clear memory" in your inventory?

Hi Adeline, you need to get a quest from your Black Spirit, where he will give you an item called "Clear Memory". It looks like a crystal shard. You RMB on it so you will get past the 99.99 block into level 50.