BSOD Waking up from sleep SYSTEM_SERVICE_EXCEPTION

Hi there, I would appreciate it if somebody looked into this for me, it's driving me crazy. After trial and error I know it is caused by my Mbox Mini external sound card. I have tried reinstalling the drivers, but I still get a BSOD waking my machine up from sleep. It can be temperamental, and used to only happen when unplugging devices after waking from sleep. The latest error is below, but I have noticed the BCCode is usually 3B. If somebody could look at the attached mini dump files and give me info to what is causing the crashes I'd be grateful.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: 50
BCP1: FFFFFA8052484C7D
BCP2: 0000000000000000
BCP3: FFFFF8800FF59A05
BCP4: 0000000000000005
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Test your RAM using Memtest86+. Let it run until 6-8 passes have completed or errors have been found.
http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html

Enable Driver Verifier. Enabling this should hopefully crash your system and then point to the faulty driver that is causing problems. However before you do, it is advised that you create a system restore point and backup first.
http://www.sevenforums.com/tutorials/101379-driver-verifier-enable-disable.html

Make sure all Windows updates are installed including the latest Service Pack.

thank you I will run the memory tests, although there are no issues whatsoever when the MBOX isn't plugged in. do you know what the culprit is from the minidumps? I have no knowledge on reading these files, and don't have the debugging programme

nobody?

What I posted above is relevant to what was found in the dumps. Do the test and enable verifier and we'll go from there.

Could you also post your system specs?
http://www.sevenforums.com/tutorials/180324-system-info-see-your-system-specs.html