Loosing assertions

Hi all,

I am loading a number of datasources from both local files and remote 
URLs into a composite datasource.

The individual datasources are retrieved via:

nsIRDFService.GetDataSource( nsIIOService.NewfileUri )
or
nsIRDFService.GetDataSource( http URL )

I am now trying to assert changes manually into the composite ds rather 
than refreshing the entire remote datasources.


The odd thing is when I assert() into the composite DS, I know the 
assertion works initially as I have CSS selectors that change as soon as 
the assertion completes. But when I check the value immediately after, 
it is as it was.



For example:

var nsIRDFService = 
Components.classes["@mozilla.org/rdf/rdf-service;1"].getService();

var nsIRDFService =
   nsIRDFService.QueryInterface(Components.interfaces.nsIRDFService);

var subject =
   nsIRDFService.GetResource(subject);

var predicate =
   nsIRDFService.GetResource(predicate);

var object = CompDS.GetTarget(subject, predicate, true);

var value = object.QueryInterface(Components.interfaces.nsIRDFLiteral);

alert( value );


value = "new value"

var literal = nsIRDFService.GetLiteral(value);

CompDS.Assert(subject, predicate, literal, true);

// Check
object = CompDS.GetTarget(subject, predicate, true);
value = object.QueryInterface(Components.interfaces.nsIRDFLiteral);

alert( value );		// Still old value




I am lost on this one, anyone got any thoughts?

Cheers,