you somehow must have changed the synthesiser for the desktop.
As far as I remember, the desktop has a different file associated with it as far as JAWS configuration is concerned.
To remedy this, with Eloquence speaking, pres CONTROL+JAWSKey+s to bring up the voice profile dialogue.
Next, tab to where it says "for Windows oS". This should read "Eloquence".
Change the synthesizer to standard, which should be your Triple Talk synthesizer.
Press enter, and all should be OK now.