That’s certainly a good place to start. Kepware has a good document on DCOM settings, including Server 2008.
Keep in mind that FSQL has not had any updates since 2009. While I haven’t actually heard of any, there may be an issue trying to run FSQL natively on a 64-bit system. Others can chime in here So, some other avenues to try:
– Use an OPC Tunneler like Matrikon’s to bypass all DCOM issues
– Run FSQL in a virtual machine.
– Upgrade to Igniton
Believe me when I say I understand the frustrations that can arise from trying to keep legacy software (and hardware, for that matter) running well in a more modern architecture.