If I read this correctly, this may be your problem:
" I copied the omnirc.tmpl from the programData path to the Program File\OmniBack\ folder..."
Is the name of the file still 'omnirc.tmpl'? If so, then this is the case of your problem, the name of the file should be 'omnirc'.
I recommend keeping the 'omnirc' file as small as possible, in your case, just the line
OB2PORTRANGE=18000-18009
When you save the file, make sure that the filename 'omnirc' has no extensions, like 'txt' or 'tmpl'
Other things to look out for
- Make sure that if the 'omnirc' file is on Windows, that you stop and restart the Data Protector INET service
- If you have enabled the OB2PORTRANGE on the disk agent, make sure that you also do this on the Media agent
- Touch base with your Firewall Administrator, and make sure that he has created a rule to allow data to pass through the assigned ports