iaStor.sys causing Blue Screen

I am running SRT in enhanced mode on my brand new Gigabyte Z68XP-UD3 board with a 2600K processor.  My accelerated drive is a 2TB Hitachi (port 1) and my cache is a 60GB OCZ Agility 3 (port 0) running on a SATA 3 port.  I have no other internal hard drives.

Lately, I have noticed that iaStor seems to forget which drive is being accelerated.  It will report that the cache drive is operating just fine, but it can't find the drive to be accelerated.  Of course, the accelerated drive has my OS on it, so the very fact that I can get to iaStor means my accelerated drive is accessible.  Also, in the right hand column, iaStor shows my 2TB drive.  Usually I am able to remedy this by resetting my cache drive and assigning it to the 2TB again, but the problem reoccurs on reboot or wake from sleep.

This morning, on wake from sleep, iaStor caused a BSOD (see details below), and after a reboot, shows no cache drive (the SSD is not even visible in the right hand column, it shows port 0 empty).

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Dump File         : 123111-17908-01.dmp
Crash Time        : 12/31/2011 7:38:11 AM
Bug Check String  : SYSTEM_THREAD_EXCEPTION_NOT_HANDLED
Bug Check Code    : 0x1000007e
Parameter 1       : ffffffff`c0000005
Parameter 2       : fffff880`012832c9
Parameter 3       : fffff880`03d62818
Parameter 4       : fffff880`03d62070
Caused By Driver  : iaStor.sys
Caused By Address : iaStor.sys+94e1
File Description  :
Product Name      :
Company           :
File Version      :
Processor         : x64
Crash Address     : iaStor.sys+3b2c9
Stack Address 1   :
Stack Address 2   :
Stack Address 3   :
Computer Name     :
Full Path         : C:\Windows\Minidump\123111-17908-01.dmp
Processors Count  : 8
Major Version     : 15
Minor Version     : 7601
Dump File Size    : 291,184
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I chose the Z68 chipset specifically because I wanted to run SRT, and I bought the SSD specifically with that in mind.  I am very disappointed in the performance (or lack thereof, since SRT hasn't been able to survive a single reboot), and would really appreciate any advice on how to resolve this.  Also, let me know if I have left out any important information.  I thought I included everything, but I know sometimes seemingly minor details can be important.