Run-time error 430

I have developed an application in VB 6.0. After installing on PC that has Windows 95 or NT 4.0, I receive the following error:
Run time error 430 "A class doesn't support automation or doesn't support the interface". However, I don't get any errors, when I run it on via VisualBasic interface (Without compiling). I created one DLL and two EXE for this project.
Thanks in advance

My problem was my program was referencing ActiveX Data Objects Library 2.6 when I was packaging 2.5 I changed my reference to 2.5 and know it works fine. If I was you I would check the version of MDAC_TYP.EXE on the machine your running your program on and compare your reference version your program is using to the version number of MDAC_TYP.EXE