When i try to click on the audio tab when i am rendering as a .MOV, I get an error occurred during the current operation: An exception has occurred.

Here are the details.

Sony Vegas Pro 8.0
Version 8.0c (Build 260)
Exception 0xC0000005 (access violation) READ:0x0 IP:0x668C3324
In Module 'QuickTime.qts' at Address 0x66800000 + 0xC3324
Thread: GUI ID=0x1B30 Stack=0x127000-0x130000
Registers:
EAX=00000000 CS=001b EIP=668c3324 EFLGS=00010202
EBX=008b0015 SS=0023 ESP=00127b9c EBP=00127be4
ECX=00000001 DS=0023 ESI=00127bf0 FS=003b
EDX=00000004 ES=0023 EDI=00127ba4 GS=0000
Bytes at CS:EIP:
668C3324: 66 0F B6 08 0F B7 C9 33 f......3
668C332C: D2 66 85 C9 7E 13 56 0F .f..~.V.
Stack Dump:
00127B9C: 6684BDE6 66800000 + 4BDE6 (QuickTime.qts)
00127BA0: 00000000
00127BA4: 9C86393F
00127BA8: 00000000
00127BAC: 00000000
00127BB0: 008B0015 00400000 + 4B0015 (vegas80.exe)
00127BB4: FBBAD493
00127BB8: C0000005
00127BBC: 00000004
00127BC0: 668C3320 66800000 + C3320 (QuickTime.qts)
00127BC4: 008B0015 00400000 + 4B0015 (vegas80.exe)
00127BC8: 00127BCC 00030000 + F7BCC
00127BCC: 00127BA4 00030000 + F7BA4
00127BD0: 001277C4 00030000 + F77C4
00127BD4: 00127F48 00030000 + F7F48
00127BD8: 668E1170 66800000 + E1170 (QuickTime.qts)
> 00127BE8: 34EA6716 34EA0000 + 6716 (qt7plug.dll)
> 00127BF4: 7E42929A 7E410000 + 1929A (USER32.dll)
> 00127C18: 10200C0C 100B0000 + 150C0C (sony4vem.dll)
> 00127C40: 10200C0C 100B0000 + 150C0C (sony4vem.dll)
> 00127C4C: 00750051 00400000 + 350051 (vegas80.exe)
> 00127C50: 006C0061 00400000 + 2C0061 (vegas80.exe)
> 00127C54: 006F0063 00400000 + 2F0063 (vegas80.exe)
> 00127C58: 006D006D 00400000 + 2D006D (vegas80.exe)
- - -
0012FFF0: 00000000
0012FFF4: 00000000
0012FFF8: 0084963B 00400000 + 44963B (vegas80.exe)
0012FFFC: 00000000

I really don't know but it never happened before when I render other clips into .mov.