change socket stone rate

Will the majority of the forum friends,How to modify them to strengthen the success rate? like this ITEM_ETC_SOCKET_STONE_HEAL_E.
My database, they can only strengthen to 1.
who can help me?
thanks very much.

sro_vt_shard > _refobjitem > pram 1 > charge rate from 1 to 100 as u like