why is outlook crashing with El Capitan

Date/Time: 2015-10-01 13:49:28 -0400

OS Version: Mac OS X 10.11 (Build 15A284)

Architecture: x86_64

Report Version: 22

Command: Outlook

Path: /Applications/Microsoft Office 2011/Microsoft Outlook.app/Contents/MacOS/Microsoft Outlook

Version: 14.5.5 (14.5.5)

Build Version: 0

Project Name: (null)

Source Version: 150821

Parent: launchd [1]

PID: 2589

Event: hang

Duration: 2.80s (process was unresponsive for 27 seconds before sampling)

Steps: 28 (100ms sampling interval)

Hardware model: MacBookAir4,2

Active cpus: 4

Fan speed: 1996 rpm