Why is my database Read Only?

[Manuel Soares]

I have a database that I created a few years ago and every once in a while
when I open it it'll open in Read Only mode (I'll get the following message:
The database 'My Database' is read only. You won't be able to save changes
made to data or object definitions in this database.)

The strange thing is that this is a sporatic occurance. Sometimes the
database will open as Read Only and other times it will not. The last two
days it opens in Read Only mode. What changes do I need to make so that the
database is not Read Only?

Thanks,
Manuel