can my lawyer who is representing me in a settlement case and a custody case make me pay him off the balance owed to him on the custody case

I have a lawyer who is representing me in a custody case and also an accident settlement. He put into the settlement statement his attorney fees for the custody case which I did not agree with nor did I sign anything saying that it was ok. I have asked for that to be changed and for a call back from him, he is only willing to talk to me in person at his office. I was told in an email that I needed to come in and sign the settlement agreement so that the lawfirm could pay their bills and make payroll. I am not comfortable with signing this because I do not agree to my attorney receiving all of his attorney fees at this time. I also stated that I would pay him $1000.00 and continue to make payments to him until he has been paid in full. Please note that this is not the 1\3 of the percentage from the accident, I have no problem with him getting that at all as we agreed to do so when I retained him as my legal representation. How do I handle this?