Client side connection error

From the EV client log, I found the following error. The form display does not seem to be smooth. And the manual store and restore takes a long time. Do you know why the following errors in the EV client log?


VERSION INFORMATION

Internet Explorer 6.0.2900.2180
Outlook 11
Operating System Microsoft Windows XP Professional Service Pack 2 (Build 2600)

USER DETAILS

User Mailbox Error getting the MAPI Property - ref: 8004010f


ENTERPRISE VAULT SETTINGS

Site Id Error - ref: 8004010f
.....
....

TESTING CONNECTION

LAN Manager Authentication Level 0
Create Connection Error - ref: 80040154