not sure what your question is. The Prof 7300 is the PCI version of the Prof 7500 so it should receive dvb-s2 just fine, as long as the software/drivers support it.
Are you using windows ? I dont beleive BDA supports dvb-s2, thats a failure of microsoft not the card nor driver.
If your using linux I'll try and give you a hand, I honestly dont use windows for much of anything now days. But others here do.
So try and post what OS your using, what software and drivers your using. Also describe your sat setup a little for us, and what sat's your attempting to tune.
Thanks and welcome to satguys.