Debug utility not writing log files

Hi,
The admin portion of my site (http://www.rentalens.ca/admin) suddenly went blank. I haven't changed anything (it was working a couple of weeks ago. I check last night and it's giving me HTTP 500 error).

After searching I downloaded the debug utility, put it in right folders and set permissions on /cache. However, it's not producing any logs. Any ideas how to fix this?

Thanks.

i assume your admin section been fixed ? if so , apply latest patch . and rename your admin folder for security reasons. you can find all info on how to change your admin folder name in Tutorial /FAQ.

Also , Debug utility deals with PHP errors . if nothing has been logged then you have no php problem , error 500 is result of server configuration problem if you still having this error , change permission on your admin folder and files, and if is good , then contact your host regarding this problem