Could not start the PostgreSQL Database Server [version # inserted here] service on local computer

My database it was going fine until today.

The error message is:

"Could not start the PostgreSQL Database Server [version # inserted here]
service on local computer.
The service did not return an error. This could be an internal Windows error
or an internal service error.
If the problem persists, contact your system administrator."

It happens when I try to run the service at control panel. I already tryed
at three different computers (WinXp and Win2000) and the error it´s the
same. It works with any data directory except one.

There was a pid file. I have removed but the problem continues.

I have looked at log messages and the is nothing. The last log was:

"2006-02-08 09:50:40 LOG: database system was shut down at 2006-02-07
19:38:10 Hora oficial do Brasil
2006-02-08 09:50:40 LOG: checkpoint record is at 0/35502C8
2006-02-08 09:50:40 LOG: redo record is at 0/35502C8; undo record is at
0/0; shutdown TRUE
2006-02-08 09:50:40 LOG: next transaction ID: 6953; next OID: 26799
2006-02-08 09:50:40 LOG: database system is ready"

There is another file but there is nothing on it.

I have read all the messages about this and havent found any solution.

Thanks for any help and sorry about my poor english :=]