Are you using the extension "extHookChangeFooterButtons". in S3 custom controller (extension of S3 controller). Following should be enough.
extHookChangeFooterButtons: function(oButtonList) {
oButtonList.oPositiveAction =
{
sid: "XBUT_APPROVE",
text: "Approve",
type: "Accept",
enabled: true,
onBtnPressed: function (evt) {
this.handleApproveEvent();
}
};
oButtonList.oNegativeAction = {
sid: "XBUT_REJECT",
text: "Reject",
type: "Reject",
enabled: true,
onBtnPressed: function(evt) {
this.handleRejectEvent();
}
};
}
Regards,
Sarbjeet Singh