SDhook32.dll crashing my firefox 4

[jagdish530]

SDhook32.dll is crashing my Firefox frequently When i tries to download something using any download manager now i am using download express and using windows 7 32bit I have copied this from windows error reporting

Problem signature:
Problem Event Name:BEX
Application Name:firefox.exe
Application Version:2.0.0.4094
Application Timestamp: 4d8374f3
Fault Module Name:SDHook32.dll
Fault Module Version:2.0.5.1
Fault Module Timestamp:4e36cc58
Exception Offset:00034e67
Exception Code:c0000417
Exception Data:00000000
OS Version:6.1.7600.2.0.0.256.48
Locale ID:1033
Additional Information 1:a604
Additional Information 2:a60441def26aff961999dcf4383f8ffd
Additional Information 3:310d
Additional Information 4:310d31ef23b766ccff59be3562f15628