I presume you were able to have the restriction lifted by the IP before the sale?
You will have to pay across enough to satisfy your total debts in full (not just the IVA figure) less legal fees and possible removal expenses.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
Your share of the equity will be no doubt due into the IVA estate unless you obtained a variation agreement before hand to use some as a lump sum settlement of the IVA and keep the balance.