Windows 7: Sorting in Newsgroups in WLM

Hi

I use WLM on a Windows 7 x64 PC.



I have a recent problem with Newsgroups in WLM, it used to show threads all grouped under one header and I clicked on the "+" sign
beside the header to get the posts to expand and show separately, then click on the "-" sign to get the thread to close up again.

Where do I go to get the threads to show under one header again.

cheers

Daniel