GW CRM Contact Service - Bad Request

Dear all,

I'm trying to build a sample client for the CRM Contact Service placed at GW ESWORKPLACE

I test it locally. When I run the sample app I get this error (from firebug console)

'http://gw.esworkplace.sap.com/sap/opu/sdata/iwcnt/contact/ContactCollection/$metadata?sap-client=800&$format=xml&$filter=SearchTerm%20eq%20%27Gateway%27

2012-11-26 18:22:55 The following problem occurred: HTTP request failed400,Bad Request,<?xml version="1.0" encoding="utf-8"?><error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"><code>/IWCOR/ATOM_ODATA_TX/004</code><message xml:lang="en">It is only possible to specify a filter for a feed</message><innererror>It is only possible to specify a filter for a feed.</innererror></error> -

No error if I copy&paste the ODataModel sServiceUrl directly in the browser.

Here is the relevant part of the source code

Any help? Really appreciate.

Thanks for your time and your cooperation.

Regards,

Mirco

p.s firebug console screenshot attached.