Our program book has abstracts in it but we give no CME credit for the abstracts - there is no problem having advertising in the program book, correct?

It would depend on what the program book, with abstracts, is used for in relation to the CME activity. If the abstracts are referenced during the activity or serve as a component of the content, then there can be no advertising in the program book. If the abstracts are not referenced as part of the CME content, and appear in the program book with all other logistical information about the activity, then there can be advertising.