Please help me!

I have a problem with psapi.dll file.

In my PC I have OS Windows server 2003 which related with more users. Someone of this users use OS Windows 98. When I start my application of Windows 98 which use based with server (Windows server 2003) appear message: Runtime error ’48’ psapi.dll is not found.
My application is have access based.
Does anyone have any idea's.