Error not connected

[dmagic]

Every night 23:59 to 00:59 i have this error in my website admin .

0 DB_ERROR_NOT_CONNECTED
in:
[select * from project_version WHERE project_version_key = 'Zen-Cart Database' ]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

And front error
/nddbc.html
Sorry!
There seems to be a problem connecting to our database. Please give us a few minutes to remedy the problem. Thank you.

[kobra]

Every night 23:59 to 00:59 i have this error in my website admin .

Only at that time??
Can you connect to your admin at other times??

[dmagic]

Only at that time??
Can you connect to your admin at other times??

Yes , can connect all the time.

[kobra]

Probably a question for your host