Sreedhar, Check whether you have a proper tablib include. If yes, are you using version 2.3. Because, in version 2.3 EL is disabled by default. You have to enable your EL either in your page directive or in your DD. You will not face these in your 2.4 version.
Srini
SCJP, SCWCD, SCBCD (EJB 2.x and EJB 3), OCA, SCDJWS