Hello sir/madam,
I have got same problem like told in here forum.joomlaworks.net/index.php?topic=8677.0 I bought plugin yesterday night "02/Agust/2009"
I receive same error blove.

         * Plugin Install: DB function failed with error number 2006           MySQL server has gone away SQL=SELECT `id` FROM `jos_plugins` WHERE folder = 'content' AND element = 'jw_sigpro'           SQL =            SELECT `id` FROM `jos_plugins` WHERE folder = 'content' AND element = 'jw_sigpro'          * Error Loading ModulesMySQL server has gone away SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 2 AND m.client_id = 1 ORDER BY position, ordering

There is a problem with the connection of your Joomla! site to the MySQL database. Forward this response to your hosting company to look it up.

it's not a MYSQL problem beacuse all other plugin istallation is work fine. (include free version of Simple Image gallery)

how can we solve this.
thanks in advance
yetkind

joomla ver : 1.5.13

ps: I'm your new customer to.
and sent already 2 support message filled support form.

bump up!

48 hours past no reply  ??? recived urgent help needed please
as you told in

In order for us to reply to you as soon as possible, make sure you always mention the e-mail address you used with Paypal, when you purchased Simple Image Gallery PRO. We will do our best to get back to you within 24 hours on working days.

Ok finaly after do many research I solve it by my self; (currently no! response from support mails as a notice from here! >:()

If someone fall in to this problem an recived an Error like this.
check they have also probably installed "YOOGallery" inside the plugin list.
even if disabled plugin doesn't matter.

simply "YOOGallery" and "SIG Pro" are conflict each other.

If you remove YOOGallery then install SIG Pro
that will work fine  8)

Thanks to me
Regards