more than 1 DatabaseControl on LinuxHost

We have installed 5 Databases 11.2.0.1 on Suse Linux 10 serverso with every Database we installed/configured DatabaseControl.

when i start the first DBControl from the first db, it works fine.

After i start the second DBControl from the second db, it will works fine for a time.

After i start the third DBControl from the third db, all DBControl will crash.

The server has enough memory, and so i think, we have a config issue.

I saw at log-files, the account was locked, so i unlocked the account, restart dbcontrol , but the crashes is my problem.