hiRegTimer is not calling my procedure

Hi all, I'm trying to use hiRegtimer to pause my code without blocking my virtuoso session my code: procedure(yhwDeleteLabel(yhwText) let((yhwCV yhwLabel) yhwCV = geGetWindowCellView() yhwLabel = setof(l yhwCV~>shapes l~>theLabel==yhwText && l~>track) if(yhwLabel then dbDeleteObject(car(yhwLabel)) ) ) ) yhwText = "netA" hiRegTimer("yhwDeleteLabel(yhwText)" 10) it never go inside my procedure. if I call yhwDeleteLabel(yhwText) without hiRegTimer then it works. What is wrong in my code. I also tried to use ipcsleep() but it block my virtuoso session. the purpose of the code was to show an info message in the layout session then disappear after 1 second display. Thanks