Help me! I can't start mysql services.

[eos li]

I created an database and I removed it yesterday afternoon.
And then I exited the mysql.
Then I changed the character set from gb2313 to utf8 and restart the services.
But I couldn't restart it.

The error information in *.err like that:
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080527 9:35:33 InnoDB: Started; log sequence number 0 43655
080527 9:35:33 [Note] C:\Program Files\MySQL\MySQL Server 5.0\bin\mysqld-nt: ready for connections.
Version: '5.0.18-nt' socket: '' port: 3306 MySQL Community Edition (GPL)
080527 16:38:56 [Note] C:\Program Files\MySQL\MySQL Server 5.0\bin\mysqld-nt: Normal shutdown

080527 16:38:58 [Warning] C:\Program Files\MySQL\MySQL Server 5.0\bin\mysqld-nt: Forcing close of thread 1 user: 'root'

080527 16:38:58 InnoDB: Starting shutdown...
080527 16:39:00 InnoDB: Shutdown completed; log sequence number 0 43665
080527 16:39:00 [Note] C:\Program Files\MySQL\MySQL Server 5.0\bin\mysqld-nt: Shutdown complete

InnoDB: The first specified data file .\ibdata1 did not exist:
InnoDB: a new database to be created!
080527 16:39:00 InnoDB: Setting file .\ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Error: all log files must be created at the same time.
InnoDB: All log files must be created also in database creation.
InnoDB: If you want bigger or smaller log files, shut down the
InnoDB: database and make sure there were no errors in shutdown.
InnoDB: Then delete the existing log files. Edit the .cnf file
InnoDB: and start the database again.
080527 16:39:01 [ERROR] Default storage engine (InnoDB) is not available
080527 16:39:01 [ERROR] Aborting
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