WP 3.1 Fatal Error issue when WP E Commerce activated

I have activated latest WP E Commerce plugin but could not log back into WP 3.1 which gave Fatal Error message:

‘Allowed memory size of 33554432 bytes exhausted (tried to allocate 24 bytes) in /home/planthez/public_html/wp-content/plugins/wp-e-commerce/wpsc-includes/purchaselogs.class.php on line 788’

My hosting organisation crazydomains.com.au have increased my memory allocation to 64 mb – everything else is unlimited.

Part of my new startup business relies on this site so need to resolve.

Any advice will be very welcome. Do not bother to advise me that I am a green ‘clutz” I already know that.

Cheers,
Bob