WCF Call fails from SOAP UI

Hi,

I have WCF Service implementaion that create's set of user's and Groups in an ADAM store.  I have created a console application to test the service. I could successfully create users in ADAM store from the .Net console app.
However, when I try to test the wcf interface method for creating users from SOAPUI,  the calls fails while creating DirectoryEntry in Adam. I get an error "Invalid Attribute Syntax".
I know that this errror is specific to DirectoryDervice, but the real question is that the error is thrown only when the service is invoked from SOAPUI and i don't get the error from a .Net client appliction. For now i am using basicHTTPBinding from .Net console app and from SOAPUI.

Any suggestions ?

Thanks & regards,
Rajiv