Can't load Checkout and other Error

For some reason I can't load the checkout page in my website. I don't what causing it... Also I'm getting this error message while going thru the website once in a while...

126 - Incorrect key file for table '/mysql-tmp/#sql_1dc4_0.MYI'; try to repair it SQL=SELECT DISTINCT b.* FROM v8ghs_hikashop_product_category AS a LEFT JOIN v8ghs_hikashop_product AS b ON a.product_id=b.product_id WHERE b.product_published=1 AND b.product_type = 'main' AND a.category_id IN (12) ORDER BY RAND() LIMIT 0, 5

Can someone help? This is the website... ckyshoes.com

Hi,

You have a mysql database problem.
Please try to repair your mysql tables like explain in the error message.

You can repair your tables using "phpmyadmin". You can also contact your hosting company if you don't know how do it.

Regards,