funny
First of all, Jwala, Approve another absence you shared above is a java screen and it doesn't work we have customers to disable this in EHP4
You had got Shankar also confused, who had provided you the correct customization
if you are using UWL, check in SWFVISU your parameters for leave request task it should call WDA and not WDJ versions!! There are many posts discussing this, do a google search first and then paste all your config of swfvisu, MSS screens etc
As indicated to you earlier, POWL and UWL both can be used for approval
it doesn't matter which EP version you are on, You can still use POWL from EHP5 for leave request mass approval.