Problem with update

Hi,

I am doing an OData update from sapui5 application. (Accessing gateway through SUP)

Here is a snippet of the code.

===================================

var oEntry = {};

//oEntry.PriceType = sap.ui.getCore().byId("dialog");

oEntry.Salesorg = "PEUS";

oEntry.UOM = sap.ui.getCore().byId("ID_Currency").getValue();

oEntry.Currency = sap.ui.getCore().byId("ID_UOM").getValue();

alert(oEntry.UOM + "--" + oEntry.Currency);

var oParams = {};

oParams.fnSuccess = function(){ alert("Update successful");};

oParams.fnError = function(){alert("Update failed");};

//oParams.bMerge = true;

debugger;

appC.oModel.update("/User_PrefsCollection('String_USerID')", oEntry, oParams);

====================================

We get an error as below

CX_SXML_PARSE_ERROR/001560AA0E081DEB8CA398CC1690D406Error while parsing an XML stream51FDB8017C1A0E6FE10000009E8D1039

Can you please me few pointers for how to go ahead?

Thanks

Krishna