If you are referring to an IVA then have you discussed your arrears with your supervisor? They may be able to discuss options for getting you back on track over the course of your IVA.
As other posters have said call your IP to see what can be done. If there are good reasons for the arrears it is possible that they could be waived by a specific variation of the proposal terms, and if you are unable to maintain any form of repayments then they can assist you with understanding more about bankruptcy proceedings as well.
