00' Kia Sephia LS not shifting past 1st gear

first you need to buy transmission fluid new filter and new gasket.you need 11.4 pints of transmision fluid.raise front of vechicle.set parking brake.block both back wheels.besure support vechicle weight with jack stands. get a drain pan.if your transmission pan dont have a drain plug.loosen rear pan bolts a few turns.remove the front and side transmission pan bolts. let fluid drain.remove tranny pan. then clean old gasket material from transmission and pan carefully.dont scratch or damage surface.clean old tranny bolts using brake cleaner or buy new tranny bolts.you have to put a tiny film of rtv silicone on tranny bolts so they wont leak.carefully remove old tranny filter and put on new filter.clean all grease grim away from tranny pan it should be **** and span because.you might need a little gasket adhesive to hold gasket in place while putting pan back on transmission.to line up bolt holes.loosely put all bolts in you have to move pan a little to get holes line up.when all is finish put tranny fluid back in.besure you put 11.4 pints back in that about 6.5 quarts. make sure tranny fluid level is right before driving vechicle.l