blank page is "Refresh Every" is set

i updated to slimstats 2.9.3 and got a blank page. i deleted all entrys in my database witch didnt help. after i tryed a few things i recogniced that it works fine when the option “Refresh Every” is set to 0 (i had it refreshed every 60 seconds)

is it possible to fix this?

http://wordpress.org/extend/plugins/wp-slimstat/