Problem with dates.(DEC AND DATS)

hai abap gurus,

i wanted to consume a webservice which is developed in nwds7.1 (using ejbs).

i generated proxys sucessfully.

but problem with the date.

one of the method in the web service

i must send a created date (field name is created_date).

when i am try to send the date

it rasie CX_AI_SYSTEM_FAULT . exception.

otherwise it not shown any exception and it is working fine.

in the proxy the field domain is:

Domain             XSDDATETIME_Z                  Active
Short Description  XSD Date/Time (UTC): yyyy-mm-ddThh:mm:ssZ  [ext.]




   Data Type        DEC        Counter or amount field with comma and sign
   No. Characters       15
   Decimal Places        0


   Output Length        19
   Convers. Routine

i am getting the createdate from a ztable

and the createdate type DATS

finally i sended the created date to webservice proxy.

could please help me,

lakshman