User First time login iFolder , after input pass parse and hint

there is a error Dialog:

Authentication faild (-23)

Remove iFolder and reinstall ifolder , same error message.

Anyone help me !!

Server Platform : NW6.5+sp1

Client platform: Windows Xp Professional +sp1
iFolder Client : 2.1.2

Best Regards
kokoo KAO

Enter Information Co. Ltd.

email :