How to trap the event for a suspended WorkItem

Dear all,

I have the following rule file in operation:

application InvoiceApproval_V5
group ifarules{
rule suspendifarule
activated by EVT_1 of BizLogic::W_SUSPENDED{PROCESSTEMPLATENAME : "InvoiceApproval_V5"}
then{
println("SUSPEND context.Exception::"+EVT_1.context.EXCEPTION);
// Code to get the desired set of user to send email to.
// Gather all information required to be sent in a mail.
val exceptionTrace=EVT_1.context.EXCEPTION; // this variable carries the exception trace that would clarify the reason for the same, to the recipient.
val PIID=EVT_1.context.PROCESSINSTANCEID;
val wname=EVT_1.context.WORKSTEPNAME;
val WIID=EVT_1.context.WORKSTEPID;
val processTemplateName = EVT_1.context.PROCESSTEMPLATENAME;
}
rule activateifarule
activated by EVT_1 of BizLogic::W_ACTIVATED{PROCESSTEMPLATENAME : "InvoiceApproval_V5"}
then{
println("ACTIVATE context.Exception::"+EVT_1.context.EXCEPTION);
// Code to get the desired set of user to send email to.
// Gather all information required to be sent in a mail.
val exceptionTrace=EVT_1.context.EXCEPTION; // this variable carries the exception trace that would clarify the reason for the same, to the recipient.
val PIID=EVT_1.context.PROCESSINSTANCEID;
val wname=EVT_1.context.WORKSTEPNAME;
val WIID=EVT_1.context.WORKSTEPID;
val processTemplateName = EVT_1.context.PROCESSTEMPLATENAME;
}

}

whilst I do see each and every activation of a workstep resulting in a log line, I don't see one for when a task becomes suspended (and yes I have made sure some workstep always become suspended to track this).

Any idea's on how to get this to work would be highly appreciated...