It's probably just a typo but you can't use vendors in the Receipts module, only customers.

The Prepayment and Deposit options are only active if you have a linked account setup for each in the appropriate module under Setup, Settings, <Module>, Linked Accounts.  This is the first place I would check.  If the program doesn't know where to send the money, it will not allow you to use the data entry.

Check the settings in both companies and see if they are the same in that Setup area of the program.

both are same but I get this when trying to enter for one company 

got it to work finally  thank you 

You are welcome.  I just saw the unbalanced error.  What was the problem there?

I dont know it corrected itself when I changed account for prepayments.  Person before me was very very basic on accounting procedures (almost abacus style - not quite but you get what I mean).  Thanks anyways for your help it is working and will make my recs easier using match transactions.