[TxMt] Synctex problem

Having just switched to TeX Live 2009, I'm experiencing a problem with synctex. Jumping from Skim to my LaTeX works fine, but "Jump to Current Line in Viewer" throws me the message

<div id="commandOutput"><div id="preText"> pdfsync.sty must be included to use this command or use a typesetter that supports synctex (such as TexLive 2008)

but then jumps to the correct line when I next typeset. On my laptop at home, where I've only ever used TeX Live 2009, things are working as they should.

I suspect the answer is simple, but having fiddled around for some time, I was unable to fix it. Does anyone have any thoughts?

Many Thanks,

Austen