SuiteCRM Stuck

I was trying to send some lead to SuiteCRM thru Web To Lead form and now my SuiteCRM have this message.

We are sorry, the server is currently unavailable, please try again later.

And now i can have access to the server. What i have to do?

PD: My server is Live on the web

This sounds unrelated to the web to lead submission. Have you discussed this issue with your host?