[TYPO3] tx commerce problem

[Brian Bendtsen]

Hi

Just installed tx_commerce and get these errors when adding a commerce 
plugin to one of my pages:

Warning: array_merge() [function.array-merge]: Argument #2 is not an 
array in 
C:\Typo3\sites\webshop\typo3conf\ext\commerce\lib\class.tx_commerce_tcefunc_categorytree.php 
on line 73

Warning: Invalid argument supplied for foreach() in 
C:\Typo3\sites\webshop\typo3conf\ext\graytree\lib\class.tx_graytree_db.php 
on line 74

Warning: reset() [function.reset]: Passed variable is not an array or 
object in 
C:\Typo3\sites\webshop\typo3conf\ext\graytree\lib\class.tx_graytree_view.php 
on line 206

Warning: Invalid argument supplied for foreach() in 
C:\Typo3\sites\webshop\typo3conf\ext\graytree\lib\class.tx_graytree_view.php 
on line 207

Fatal error: Call to a member function wrapIcon() on a non-object in 
C:\Typo3\sites\webshop\typo3conf\ext\graytree\lib\class.tx_graytree_view.php 
on line 728

I googled it and found one who had the same problem but there was no 
real answer to it.

/Brian Bendtsen