Help! What could be the cause of this?

ETA: I just tried it again and it is working now lol But if anyone has any insight as to what caused it to begin with, that would be great...that way I know if it happens again.

*Trying to log into the admin this morning to finish up before grand opening and got the following message:

0 DB_ERROR_NOT_CONNECTED
in:
[select * from zen_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.

I can tell it has to do with the database, but am not sure exactly where I need to go to fix it. It was all working fine last night when I went to bed and I haven't changed anything (that I know of) that could disco the database. Can someone please help?*

Thanks!

Have you tried reinstalling from the last backed up DB copy?

You might want to contact your host and see if they've had any hiccups on their side.