unable to call dllregisterserver

I've created a setup.lst with vb6 and I can't install my soft on an other PC. When it try to install the dll components of database, a message box is opened and it says : Unable to call DLLRegisterServer, Unable to load file "Program Files\Fichiers Communs\System\ole DB\msdadc.dll" to register it
But this file exist in the directory and it's the last version. How create my setup? More Information : My soft works with Access Database
Thanks to Help me

You need dcom98 to be installed on your target system if its a Win95 / 98 system. You find it on your vb6 CD.