HTTPendpoit doesn't work on fresh install 1.5.2

Hello guys, We have done a fresh install with the new 1.5.2 release and have copied all our services (made on a 1.5.1 install) to the new server. Most things work fine but I cannot run mashups via a HTTPEndpoit. It works on our other environment wit 1.5.1. (all windows installs). I know in the tyit page the URL for the HTTPEndpoint is buildup automatically when you enter the prompts. It works like tant in our 1.5.1. environment. When entering promptvalues in the tryit no URL in build up on our 1.5.2. environment. I added two screenprints. This is our mashup code: (I have no escaped the scripts)

this.serviceName = "ms_002de_cache";
this.documentation = "This mashup uses the ds_002de_cache dataservice to get open debt items";

getresult.documentation="Enter here user, password, cmpcode, actcode, refresh";
getresult.inputTypes = {"usrcode":"string", "password":"string", "cmpcode":"string", "actcode":"string", "refresh":"string"}
getresult.outputType = "#raw";
getresult.safe = "true";
getresult.HTTPLocation = "getresult/{usrcode}&{password}&{cmpcode}&{actcode}&{refresh}";


function getresult(usrcode, password, cmpcode, actcode, refresh)
{
var dataService = new WSRequest();
var options = new Array();
options.useSOAP = false;
options.useWSA = false;
options.HTTPmethod = "GET";
options.HTTPversion = "1.1";
var payload = {usrcode}{password}{cmpcode}{actcode}{refresh};
var result;
try {
dataService.open(options,"http://192.168.46.13:7762/services/admin/ds_002de_cache/",false);
dataService.send(payload);
result = dataService.responseXML;
} catch (e) {
result = e.toString();
}
return result
}

sendmail.documentation = "Send E-mail" ;
sendmail.inputTypes = {"from":"string", "to":"string", "subj":"string", "msg":"string"}
sendmail.outputType = "string";

function sendmail(from, to, subj, msg)
{
     var email = new Email();
     email.from = from;
     email.to = to;
     email.subject = subj;
     email.html = msg;
     //email.text = msg;
     email.send();
     return "done";
}

!!This occurs in the Tryit pages only!!!

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