Visual Form Builder Pro with PayPal

We have the latest versions of everything. We have been using Visual Form Builder Pro and love it, BUT we seem to have ran in to a BIG problem! We are a small art club and use the forms for registration. If people register online we like to offer them the obtion to pay bt PayPal or send us a cheque. If they owe us $50 and select to pay by PayPal they are sent to PayPal, BUT if they select by cheque, they are sent to PayPal. Is there anyway of not going to PayPal if the person selects pay by cheque?