According to the XAMPP Security Page, it says:
A MySQL server is not running or is blocked by a firewall! (version 5.5)
It says the same thing for FTP and POP3 (what exactly are these?)
When MySQL is started, the error log displays the following:
120618 22:50:12 [Note] Plugin 'FEDERATED' is disabled.
120618 22:50:12 InnoDB: The InnoDB memory heap is disabled
120618 22:50:12 InnoDB: Mutexes and rw_locks use Windows interlocked functions
120618 22:50:12 InnoDB: Compressed tables use zlib 1.2.3
120618 22:50:12 InnoDB: Initializing buffer pool, size = 16.0M
120618 22:50:12 InnoDB: Completed initialization of buffer pool
InnoDB: Error: auto-extending data file C:\xampp\mysql\data\ibdata1 is of a different size
InnoDB: 256 pages (rounded down to MB) than specified in the .cnf file:
InnoDB: initial 640 pages, max 0 (relevant if non-zero) pages!
120618 22:50:12 InnoDB: Could not open or create data files.
120618 22:50:12 InnoDB: If you tried to add new data files, and it failed here,
120618 22:50:12 InnoDB: you should now edit innodb_data_file_path in my.cnf back
120618 22:50:12 InnoDB: to what it was, and remove the new ibdata files InnoDB created
120618 22:50:12 InnoDB: in this failed attempt. InnoDB only wrote those files full of
120618 22:50:12 InnoDB: zeros, but did not yet use them in any way. But be careful: do not
120618 22:50:12 InnoDB: remove old data files which contain your precious data!
120618 22:50:12 [ERROR] Plugin 'InnoDB' init function returned error.
120618 22:50:12 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
120618 22:50:12 [ERROR] Unknown/unsupported storage engine: InnoDB
120618 22:50:12 [ERROR] Aborting
120618 22:50:12 [Note] c:\xampp\mysql\bin\mysqld.exe: Shutdown complete
What should I do here?