Thank you. I checked and my individual site WAS on 5.2.17.
How I fixed it:
Found line in .htaccess: AddHandler application/x-httpd-php52 .php .php5 .php4 .php3
Then I changed the x-httpd-php52
to x-httpd-php53
That solved the problem; you may want to add it to your info page because I assume it is the same for most Arvixe users.