I also have the Motorola MPX200 and have had no luck with EasySync.
When I launch EasySync Pro 4.2.1 my phone says
that it is installing the EasySyncPro.cab then the message goes away.
Then I get cannot connect to the device and this is whats in the rsSync.log on with the debug option 5 on:
55:28 Device Type = Windows CE 2.x / Pocket PC
55:28 CE part ver = 0 , PC part ver = 53
55:28 ERROR: CE part ver = 0 , PC part ver = 53
55:48 ERROR: WINCE-GetMachineInfo connection failed
55:48 CRSyncUtil::GetMachineInfo : GetMachineInfo() API failed in translator 'PocketPC'. Error message : Unable to connect to device. Verify that ActiveSync is running.
ActiveSync is running at the time.
Is this the same error your getting?
This message in the IBM support forum says if the device is running Pocket PC 2003 then this is a known problem and its not supported for some reason.
http://www-1.ibm.com/support/docview.wss?rs=465&context=SSKTPA&q=2003&uid=swg21114699&loc=en_US&cs=utf-8&lang=en+en
Maybe the Motorola MPX200 Smartphone is running some flavor of Pocket PC 2003 given the info in the link and whats in the About:
Microsoft Windows Powered Smartphone 2002
Version 3.0 (Build 13258)
Radio Version 1.00
@1996-2002 Microsoft Corporation.