Left Voicemail Button...redirect issue

{!requireScript("/soap/ajax/24.0/connection.js")} var lead = new sforce.SObject("Lead"); lead.Id = "{!Lead.Id}"; lead.Status = "Left VM - Email"; result = sforce.connection.update([lead]); if (result[0].getBoolean("success")) { window.parent.location.href = "/00T/e?followup=1&title=Call$retURL=%2F{!Lead.Id}&who_id= {!Lead.Id}&tsk5=Left+Voicemail&tsk6=Left+a+voicemail+for+{!Lead.Name}&tsk5_fu=FU+VM+w+ {!Lead.Name}+from+{!Lead.Company}&tsk4_fu={!TODAY()+2}";} else { alert("failed to update lead " + result[0]); }

I have the above custom button for leads. It allows reps to click the button, change the status, and create pre-populated tasks.

My question is, after save, is clicked on the task, it redirects to the user's home page. How can I make it redirect back to the lead?