ActiveSync 4 WM5 -- 80070490 Error

This calendar synchronization problem ( support code: 80070490 ) is a known
issue with HP Support. It's seems that only HP Ipaq 2750 upgraded to WM 5.0
have this problem. Not all but some off theme. The problem is happening on
both versions of Activesync 4.0 and 4.1.
We found out that resetting the 2750 after the WM 5.0 update is not going
well on some machine’s. Then most people do a reset on the 2750 by pressing
I-task and Calendar button together with the styles reset button. This is
indeed a COLD reset, but NOT a CLEAN COLD reset like the machine shout do
after upgrading to WM 5.0.
You only do a hard reset in WM 5.0 by pressing 3 key’s and the styles reset
button together for four seconds. The buttons are:
1 calendar
2 messaging
3 on/off
4 Styles reset button

This worked for me, after this reset my 2750 synchronized all appointments,
contacts and all the rest. Only when the appointments database is big (like
more than one year) then the synchronisation will take up some time like 2
hours this is normal and a problem of activesync from Microsoft. After the
first complete synchronisation it is better to synchronise by Bluetooth, this
is faster and acceptable course only chances made are synchronizing.


Hope this will help some people with the same problem I experienced.