Instantcake 6.4a not working

1 post / 0 new
Instantcake 6.4a not working

My problem is I want to add hours to my HDVR2. It has a 300gb  Maxtor drive in it now and I bought a 300gb seagate db35 drive to add to it. When I hook the new drive to my computer it only says it is 137gb and not 300gb. I tried the software anyway and when it was done and I put the drive in the unit it doesn't recognize the extra space. Is this because of the drive limitation? If so how can I overcome this?