SOLVED! - HELP! white screen for creating products

[rpaerd]

Hi together,

my Joomla Version is 2.5.4 and my VirtueMart Version is 2.0.6

Yesterday I've tried to install VM 2.0.6 on a local Server into Joomla 1.6.6 and everything was working well !

Today I've tried to install the same VM 2.0.6 on the same local Server into Joomla 2.5.4 and everything seems also working very well. But when I came to the products area and tried to create a productgroup or a product or a calculating-rule I always get a white screen.

No errormessages no Joomla backend no VM backend just a white screen. The productgroups and products are the last things to put into the shop. Everything else was working well.

Where can I search for this problem?

Addition 2012-04-29 17:56 MEST

this problem is solved in case of making a new installation of a fresh Joomla and VM. I don't know the reason but the earlier version was a installation of Joomla 1.6.0 with step by step upgrade to version 2.5.4.

Kind Regards

Ralph