Modbus problem

Hi,

Thanks for reading. Iam using Modbus for connecting to a Server with a modem, dialing and getting some values from the server. Everything works fine, but in some machines, Modbus server is failing to register so the dialer does'nt work.
I even tried registering it manually

MBServer.exe /RegServer
But it fails to register and reports some access violation in Ole32.dll. This happens only in one WindowsNT(I have SP5) and in another Windows98 machine. Rest all machines it works fine.

Any idea about this??

Thnx,
Pres.