i am still having trouble with my uploads, with no success finding the problem,

i am getting this error message at upload,
ERROR: Unable to execute query


UPDATE `video` SET
`space`=1.91,
`duration`='35',
`video_length`='00:35',
`server_id`=0
WHERE `VID`=449
MySQL server has gone away

although i get this message, video if it is in flv format will show up in admin panel, with no runtime displayed, i am able to convert again and runtime appears, all other file types show in admin panel with no video to play and convert again does not work,

when convert again is run, i get this error message.
ERROR: Unable to execute query
SELECT * FROM `config` WHERE `config_name`='enable_flvtool'
MySQL server has gone away

upload.php',

this started after the upgrade to 2.6

please someone help.