error converting datetime from nvarchar

Hello,

after successfully calling my WS (an endpoint in SQL Server 2005) which is supposed to write a simple record with a few ints, varchars and datetimes I now get a response ! Unfortunately it’s “error converting datetime from nvarchar…” or something like that (it’s in german). Of course no record is created. I already tried the procedure behind the endpoint and it’s working fine.

I think it’s some old problem I already had a few months ago concerning the SQL-type of datetime and the same in BTS which seem to be incompatible. So my questions are:

Where do I have to interfere ?

What should I cast to what and how ?

Regards, Michael