Tekkit Crashing after playing for about 20 minutes

[DevilCaller16]

Title: Tekkit Crashing after playing for about 20 minutes

Version: 3.1.2

OS: windows 7

Java Version: 7 update 15

Description of Problem:

it will start normally but after 20-30 minutes it will randomly crash with this error report

Error Messages:

Error Log:

#

# A fatal error has been detected by the Java Runtime Environment:

#

#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000007fee65f6220, pid=6912, tid=6332

#

# JRE version: 7.0_15-b03

# Java VM: Java HotSpot 64-Bit Server VM (23.7-b01 mixed mode windows-amd64 compressed oops)

# Problematic frame:

# C  [OpenAL64.dll+0x6220]  alSourcei+0x144

#

# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows