ok i found an error log - i had to use cpanel....
I have many lines with this
[23-Feb-2009 18:05:03] PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 90 bytes) in /home/tcgraphi/public_html/app/code/core/Mage/Eav/Model/Mysql4/Entity/Attribute/Collection.php on line 328
and many lines with this
[Tue Feb 24 16:26:54 2009] [error] [client 126.96.36.199] Failed loading /usr/local/Zend/lib/Optimizer/php-5.2.x/ZendOptimizer.so: /usr/local/Zend/lib/Optimizer/php-5.2.x/ZendOptimizer.so: undefined symbol: compiler_globals
does this mean anything???