Need help on the client.

im new to maple 6.2.now i already downloaded the whole thing.i also downloaded the summer client and patch.but when i run maple its say cant find WzMss.dll.after i searched for solution.they ask me to install [vcredist_x86] which i already did.after i installed vcredist_x86,i can run summerstory but its very lag.the cursor move so slow.i tried to log in but its say unable to connect to server.im not using a very power com.but at maplesea,i cant run it smoothly.what could be the lag problem? anyone could help me with this?