The Kepware driver has some good help, I have not tried counters before, check in driver help.
One thing I have noticed you may need to get the right number of zero's in the address.
Also are you configuring the tags in kepware or in your scada app.
You don't need to have them in kepware.
All you need is a channel setting up.
I.e. if you use the default.
Channel1 & Device1 then the tag becomes
Channel1.Device1.D0003 in the scada, I'm using mitsubishi in this example as I'm currently configuring a scada project with over 10,000 Tags.