I upgraded my vacationmemory.com to 1.5.9 and it is not working
why??

thanks

Your site gives a Http 500 error which almost always is caused by file permissions issues on your host.

so how do I fix it?

Please review https://www.zenphoto.org/news/installation-problems/

I just ftp all my albums to my laptop and then ftp back to a fresh copy....easier that way