Muhammad Saeed - 2013-11-08

I am installing itop-beta (relesed in oct -2013) , Everything seems correctly configured to me,
but when the installtion starts it gets stuck at 40 % .It says "Updating database schema"
I've waited a long time ,more than half an hour it doesn't go any furthur.
Can anyone tell whats the problem and how can it be fixed ,,Thanks in advance for any help.