Authorize.net causes error: 2013 Lost connection to MySQL server during query

[John Vieth]

Trying to check using Authorize.net causes error: 2013 Lost connection to MySQL server during query

If I check out using check as payment method, it works fine. But when I try using a credit card, I get the error. Based on the error text (below), it looks like the server did hear back from Authorize.net and the test credit card number was approved. What could be causing this? Please help!!! Here's the error report...

2013 Lost connection to MySQL server during query
in:
[insert into store_authorizenet (id, customer_id,order_id, response_code, response_text, authorization_type, transaction_id, sent, received, time, session_id) values ('', '2', '2', '1', '(TESTMODE) This transaction has been approved.', 'auth_only', '0', 'Array ( [x_login] => ******* [x_tran_key] => ******* [x_relay_response] => 

CUT SOME OF QUERY HERE TO KEEP IT SHORT

ess Pads - One size fits all(qty: 1) [Date] => November 20, 2007, 11:16 am [IP] => 137.104.164.217 [Session] => db4d9a3fe13e64967f8090a50ae1168e [url] => https://secure.authorize.net/gateway/transact.dll ) ', '1=1&2=1&3=1&4=%28TESTMODE%29+This+transaction+has+been+approved.&5=000000&6=P&7=0&8=2&9=Medline+Injection+Site+-+Injection+Site%28qty%3A+1%29+%2B+Unisex+ASEP+Barrier+Short+Lab+Coat+-+White+2XL%28qty%3A+1%29+%2B+Soft-Fit+Mattress+Pads+-+One+size+fits+all%28qty%3A+1%29&10=420.80&11=CC&12=auth_only&13=2&14=John&15=Vieth&16=Master+Websmith&17=12308+Tama+Run+Lane&18=Darlington&19=Wisconsin&20=53530&21=United+States&22=%28608%29574-8731&23=&24=john%40masterwebsmith.com&25=John&26=Vieth&27=&28=12308+Tama+Run+Lane&29=Darlington&30=Wisconsin&31=53530&32=United+States&33=&34=&35=&36=&37=&38=DA6892F352B5E7E435F4F405CF9A7565&39=&40=&41=&42=&43=&44=&45=&46=&47=&48=&49=&50=&51=&52=&53=&54=&55=&56=&57=&58=&59=&60=&61=&62=&63=&64=&65=&66=&67=&68=&69=November+20+2007+11%3A16+am&70=137.104.164.217&71=db4d9a3fe13e64967f8090a50ae1168e', 'November 20, 2007, 11:16 am', 'db4d9a3fe13e64967f8090a50ae1168e')]
2006 MySQL server has gone away
in:
[select count(*) as total from store_sessions where sesskey = 'db4d9a3fe13e64967f8090a50ae1168e']

Warning: Unknown(): A session is active. You cannot change the session module's ini settings at this time. in Unknown on line 0