Foreclosing On a SEcond Lien

[Dick Green]

I've got a client that bought a property for $129,000 then sold it for $169,000 with 10% seller financing. The buyers (after 2 -3 years), are in bankruptcy (chapt 13), but have not listed my client, the sub-ordinate lien holder as a claimant in the case. The subordinate lien is on file at the courthouse. I don't want the property to foreclose causing it (the second) to wash out/be discharged.
My question is:

How does he go about satisfying the 1st lien (preferrably short) and forclosing on the second, regaining possesion of the property. The current value of the property is aprox. $200,000.

Thanx in advance for any suggestions.