Somethin wrong with my Guestbook

Its been workin GREAT for the past who knows how many days. I didn't edit it since I got everything working. Now it comes up with this error just his morning:

Query Error
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MySQL Error : Query Error
Error Number: 1030 Got error 28 from table handler
Date : Tue, February 18, 2003 02:25:53
IP : 12.251.53.11
Browser : Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; DigExt)
Referer :
PHP Version : 4.2.2
OS : Linux
Server : Apache/1.3.27 (Unix) (Red-Hat/Linux) mod_jk/1.2.0 mod_perl/1.24_01 PHP/4.2.2 FrontPage/5.0.2 mod_ssl/2.8.12 OpenSSL/0.9.6b
Server Name : www.zeldapower.com

Any help? ^_^

This is the error I've been getting the last few days. It worked just fine before, for approximately a month.

QUERY ERROR
MySQL Error : Query Error
Error Number: 1030 Got error 69 from table handler
Date : Tue, February 18, 2003 14:59:43
IP : 213.46.27.183
Browser : Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)
Referer :
PHP Version : 4.1.2
OS : FreeBSD
Server : Apache/1.3.27 OpenSSL/0.9.6g (Unix) PHP/4.1.2
Server Name : www.shine4u.com