MeGui error while encoding

[Arshad07]

here's my error

Problem signature:
Problem Event Name: BEX
Application Name: MeGUI.exe
Application Version: 0.3.0.3011
Application Timestamp: 492ed6c2
Fault Module Name: StackHash_fd00
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 05c68a1b
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 2057
Additional Information 1: fd00
Additional Information 2: ea6f5fe8924aaa756324d57f87834160
Additional Information 3: fd00
Additional Information 4: ea6f5fe8924aaa756324d57f87834160

this occurs as soon as it starts encoding, any help much appreciated (Y)