Weird Error!! (Vb6 + vb.net)

i have writtent a small multi thread com interop class and using it with vb6, which is working fine on the system i am programmin, but when i am trying to use the app else where, it open fine, but error out unexpectedly, the error shown by windows is

Code:

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Description:
  Stopped working

Problem signature:
  Problem Event Name:        CLR20r3
  Problem Signature 01:        ftp mp3 bot v1.0.exe
  Problem Signature 02:        1.0.0.0
  Problem Signature 03:        4e3aa429
  Problem Signature 04:        mscorlib
  Problem Signature 05:        2.0.0.0
  Problem Signature 06:        4d8cdd0e
  Problem Signature 07:        e39
  Problem Signature 08:        1e8
  Problem Signature 09:        System.Reflection.Target
  OS Version:        6.1.7601.2.1.0.1296.17
  Locale ID:        1033

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please help!