error while regestering a dll in 9.3.1

[srinivasreddy]

I have return a small dll on ArcGIS 10 and visula studio 2010 when i was registering on other machines it is working fine.
But when i wrote the same code in Visual studio 2008 and running on 9.3.1 it is working on my system perfectly. But when i try to register this dll on other systems using esriRegSvr it is showing "Unable to locate exported function dllregisterserver." even this same error is occurring on my system when i use   esriRegSvr.

Please somebody help me thank you.....

Srinivas

[FengZhang2]

Is your program .NET type? .NET assemblies need to be registered using the regasm utility. Please look into the following help page:
-- How to register .NET components with COM --
http://resources.esri.com/help/9.3/arcgisdesktop/dotnet/9826f81b-278c-49cc-a912-ab8d86f5e91e.htm