Checkout freeze

[Annerie]

I have recently realised that for some reason my online checkout doesn't seem to work any longer.  It freezes on checking out, whether checking out as guest or whether you want to register. It did not do this in the past and I have tried to read up everywhere without success. Any help would be highly appreciated.
Using Joomla 2.5.28 and Virtuemart 2.6.22

[Jörgen]

Perhaps the php is updated and breaks the site. Perhaps a new extension has been added ?

Old and insecure vm and joomla versions

Jörgen @ Kreativ Fotografi

[jenkinhill]

It's very likely to be caused by a server update. Check error logs to see if anything is recorded, and try turning on VM debug.

See http://forum.virtuemart.net/index.php?topic=118683

[Annerie]

Thanks!  Have just activated debug system...Hope it works.

[GJC Web Design]

This should ONLY be activated while testing !

and u have to read and analysis what it says .. and switch it back off!!!