Why does my F5 LTM VE keep running out of space?

I have installed the F5 LTM VE on my VMWare Fusion and I keep getting warnings that it has run out of space. I increase the amount of disk space and then it runs out again. I only send traffic by hitting on occasion a LAMP server, so not sure why this is happening. Audit logs are set on verbose, but, again, hardly touching the box. Now I can't log in to change settings because it keeps running out of space.