IssueStatement field

Hi;
RT-3.6.1, apache2,dbix:1.38 etc etc
I use the IssueStatement field to store the value of the queue the
ticket was originally created in …
I got populating the field to work from a scrip and worked like a dream
using
$self->TicketObj->SetIssueStatement ($self->TicketObj->Queue); Nice and
easy no problems
However I have a problem selecting tickets based on that field, using :
$tickets->Limit(FIELD => “IssueStatement” , OPERATOR => “=”, VALUE => $q
, ENTRYAGGREGATOR => ‘OR’, DESCRIPTION => “IssueStatement” );
Doesn’t seem to work … I tried with and without ENTRYAGGREGATOR and
DESCRIPTION …

Any help will truly be appreciated …
Thanks;
Roy