x264 and xvid_encraw executables crashes in Vista

[MixMasters]

I don't know it's been couple of days everytime when i start the encode it gives following error

xvid_encraw.exe error log


Log Name: Application
Source: Application Error
Date: 8/22/2009 8:05:49 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: MixMasters
Description:
Faulting application xvid_encraw.exe, version 0.0.0.0, time stamp 0x46d75f5f, faulting module ntdll.dll, version 6.0.6001.18000, time stamp 0x4791a7a6, exception code 0xc0000005, fault offset 0x00043118, process id 0xb58, application start time 0x01ca22d14235e411.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-08-22T02:35:49.000Z" />
<EventRecordID>1223</EventRecordID>
<Channel>Application</Channel>
<Computer>MixMasters</Computer>
<Security />
</System>
<EventData>
<Data>xvid_encraw.exe</Data>
<Data>0.0.0.0</Data>
<Data>46d75f5f</Data>
<Data>ntdll.dll</Data>
<Data>6.0.6001.18000</Data>
<Data>4791a7a6</Data>
<Data>c0000005</Data>
<Data>00043118</Data>
<Data>b58</Data>
<Data>01ca22d14235e411</Data>
</EventData>
</Event>


x264 Log

Log Name: Application
Source: Application Error
Date: 8/22/2009 7:56:41 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: MixMasters
Description:
Faulting application x264.exe, version 0.0.0.0, time stamp 0x4a89beca, faulting module AviSynth.dll_unloaded, version 0.0.0.0, time stamp 0x494eb94d, exception code 0xc0000005, fault offset 0x100e0c6d, process id 0x9c0, application start time 0x01ca22cffb4163f1.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2009-08-22T02:26:41.000Z" />
<EventRecordID>1220</EventRecordID>
<Channel>Application</Channel>
<Computer>MixMasters</Computer>
<Security />
</System>
<EventData>
<Data>x264.exe</Data>
<Data>0.0.0.0</Data>
<Data>4a89beca</Data>
<Data>AviSynth.dll_unloaded</Data>
<Data>0.0.0.0</Data>
<Data>494eb94d</Data>
<Data>c0000005</Data>
<Data>100e0c6d</Data>
<Data>9c0</Data>
<Data>01ca22cffb4163f1</Data>
</EventData>
</Event>


It's a Windows Vista Ultimate SP1 x86

[Dark Shikari]

Read the error logs.

faulting module AviSynth.dll_unloaded

[MixMasters]

i re-installed AviSynth 2.5.8 three times but i still have the problem
btw what's the matter with xvid_encraw?