security in details

ndifreke

i need aliitle help .. am trying to implement the security realm in tomcat.. where by wen the user logs in tomcat verifies the user from my DB(mysql).. i have followed all instructions in the documentation and search the web.. now everyone says the code for DBRealm is commented i have uncommented them and commented the memory realm...(that i have edited the server.xml file directly and restarted tomcat) but it still doesn't do the job. pls if u know how to go about these help me out with a little step 2 step guide.. thanks