Bank Rec

I have recently started to set up a company that was using Sage but not the bank Rec feature since 2015.  The system will not allow me to process my first month transactions.  I spent today in a live chat with Sage who told me to dump my bank rec file and recreate the feature which I did.  I was happily moving along when I balanced the first month again and tried to post.  Now I am getting a message that said my bank rec does not match the FI or FH and that I should check again and make sure it does.  The rec itself is totally balance however the system does not think the opening balance is in agreement with... something....  Any ideas?  I have never run into this before.  It will not let me post.