strange database problem or may be hacking issue not sure

[PAKIDIL]

hello,
i am having strange database problem. today my datbase was automatically deleted dont know how but its not there and database error is appearing on my forum . when i check through cpanel there wasnt any database at all .

if its hacking issue this is wot i have not allowed in my forum
no chmd 777
no attachment allow

this is wot i have allowed

upload album (gif,jpg etc)

shows links like youtube,sevenload

so does any one has any experience about it ?

waiting for reply

thanks