2006 - MySQL server has gone away

select pov.products_options_values_id, pov.products_options_values_name,pov.products_options_values_description, pa.attributes_model, pa.options_values_price, pa.price_prefix, pa.attributes_stock, pa.attributes_model from products_attributes pa, products_options_values pov where pa.products_id = '33839' and pa.options_id = '1' and pa.options_values_id = pov.products_options_values_id and pov.language_id = '1' order by pa.sortorder

[XT SQL Error]

2006 - MySQL server has gone away

select count(*) as total from sessions where sesskey = 'cd63eef084861283c8748b95a8ddf011'

[XT SQL Error]