>So you do not use the Compile model.
>Still it does not solve my problem because with the Proxy.vb in the App_code It's still not working. :(

The first think to do is to make sure your browser can load the asmx. I assume this is not the case presently. So, there is something conflicting and that could be cause by a class name or something like that. Is that the only Web Service you have on that server?