I tried to install roundcube mail over my system,but encounter errors.

[sunzhoujian]

I have set up the hmailserver. I just put files under the webfolder. And I clicked http://www.bendigou.com/webmail/installer/index.php,but I encountered error or warning like these:

1."Warning: preg_match() [function.preg-match]: Compilation failed: unknown property name after \P or \p at offset 30 in D:\web\bendigou\webmail\program\lib\Roundcube\bootstrap.php on line 90"

How can I solve that?

2.Checking available databases

Check which of the supported extensions are installed. At least one of them is required.
MySQL:  NOT OK(PHP >= 5.3 required)

How can I still use the current MySQl?

[sunzhoujian]

Check config files
main.inc.php:  NOT OK(Unable to read file. Did you create the config files?)
db.inc.php:  NOT OK(Unable to read file. Did you create the config files?)
Check if directories are writable

Roundcube may need to write/save files into these directories
Config:  NOT OK(Could not read config files)
Check DB config
Config:  NOT OK(Could not read config files)

[SKaero]

If you want to use MySQL you'll need PHP 5.3 or higher.

[alec]

There's a bug in 0.9.3 on Windows. http://trac.roundcube.net/ticket/1489290