filterByDate doesn't work on 'ProductFeatureAndAppl' entity

[praveen.agrawal]

I am trying :

EntityUtil.filterByDate(delegator.findByAnd("ProductFeatureAndAppl",UtilMisc.toMap("productId"
,context.productId,'productFeatureTypeId',COLOR,'productFeatureApplTypeId','SELECTABLE_FEATU
RE')),true).

But this doesn't work since it returned the all rows.

Can anyone help me on this.