Upgrade form j to m problem with payment and shipping

[TimBerr]

Hi cant access the payment and shipping tabs in admin since upgrading from j to m get 500 error using joomla 1.7.3 How do i solve the problem?

The problem occours when trying to accessindex.php?option=com_virtuemart&view=shippingcarrier & /administrator/index.php?option=com_virtuemart&view=paymentmethod

The only error message in the server logs are
Premature end of script headers: index.php, referer: administrator/index.php?option=com_virtuemart

[Milbo]

You must also install the aio to get updated plugins,.. .these will be extremly important when you install the upcoming version RC3