Attachment Size - MySQL Error

[dseften]

Hi Everyone,

I've played around with my first and only forum for the past couple of weeks trying to figure out how to effectively increase the size for allowable attachments before submitting this post. I guess I'm getting mixed messages. On the welcome screen of the Vbul admin control panel, I notice...

PHP Max Post Size: 8.00 MB
PHP Max Upload Size: 5.00 MB

I've also gone into Attachment Manager and altered the maximum allowable sizes to...

Maximum Filesize: 2000000 (2MB) and
4000000 (4MB)

After having done so, I'm getting a vBulletin DB Error

MySQL Error : Got a packet bigger than 'max_allowed_packet' bytes
Error Number : 1153
Date : Wednesday, September 27th 2006 @ 01:42:29 AM
Classname : vb_database

My users will routinely post large size pdfs so it is requirement I'm trying to fulfill. Is this a...

MySQL limitation;
PHP limitation;
vbulletin limitation;
knowledge limitation?

Any help is greatly appreciated.

Best, Dave