manual installed WebService not working completely

Posted this already on the Dynamics User Group, but didn't get any reply yet.

I won't bother you with all the details, but I've installed a working RTC client for Nav 6.0 sp1. With SQL and the server tier both on a seperate server.

But now i've installed a webservice, that has a dependency with the rtc service tier.

I've configured a codeunit and a page as a webservice in navision.

When connecting to "http://myserver.mydomain:7073/DynamicsNav/WS/CRONUS_International_Ltd/services" the page won't open. But I do see a succesful kerberos logon on my sql server.

When connecting to "http://myserver.mydomain:7073/DynamicsNav/WS/CRONUS_International_Ltd/codeunit/CapitalizeCU" I receive the following page:
- <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;
- <s:Body>
- <s:Fault>
<faultcode xmlns:a="urn:microsoft-dynamics-schemas/error">a:Microsoft.Dynamics.Nav.Service.WebServices.ServiceBrokerException</faultcode>
<faultstring xml:lang="nl-NL">Service "CRONUS_International_Ltd/codeunit/CapitalizeCU" was not found!</faultstring>
- <detail>
<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Service "CRONUS_International_Ltd/codeunit/CapitalizeCU" was not found!</string>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>

So, it seems to work only partly.
Can anyone give me some advice on how to proceed.

Thanks for your reply.