How to call a database controller in backing file

Hello,
First of all, I'd like to apologize if this question is posted by someone else before. But because I haven't been to find the answer so I just post this question here with hope that someone will have the answer for me.
I am using weblogic 8.1 SP3. I am trying to build a web portal which requires users to login and logout. Based on the tutorials from BEA and the documents that I read in this forum, I decided to use backing file to check for the username and password. I am using MySQL database and I have a page flow controller which is based on the database control. How can I call that control in the backing file? Or is there anyway to compare the username and password that the user enters to the ones in the MySQL tables? I don't want to create a database connection in that backing file since the page flow controller can do that for me already.
Any help is appreciated
Thanks in advance
TL

select ename from emp@dblink
...lose the double quotes.
Scott

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http://www.sap-basis-abap.com/saptab.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9bfa35c111d1829f0000e829fbfe/content.htm
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