[Plugin: TPC! Memory Usage] No refreshing?

Hello, I recently had a problem with my 32M limit almost reached. I increased the limit to 64M in my files (.htaccess, default-constants.php and wp-config) and now the dashboard widget shows something weird.

The test file shows my limit to be 64M, but the dashboard says my PHP Memory Limit is still 32M. Any ideas who is right?
Cheers

http://wordpress.org/extend/plugins/tpc-memory-usage/