TSAPI 17500 , System label exception

Hi  all ,

I have existing  Dll , this dll created  in labwindow CVI 6.0  or may be in lower version of CVI .

This dll run in TestStand 2.0 & windows 2000  working prefectly.

 Same dll i am running in  TestStand 2012  , the dll generating problem  "System Label Exception   error code = -17500".

How to resolve this problem.  I want to run this dll  in  TestStand 2012 & window 7.

Thanks

Mukesh Kumar