Reliability?

It seems that quite often I get the following message:

Zoho CRM

The page you are looking for is temporarily unavailable

Sorry crawfurd@thinkingmortgages.com, the following may be the reasons for the unavailability:
Database Connection Errors
Network Connectivity Issues

We will duly fix this issue.

...which means that you're not very reliable! Why is this happening?
crawfurd