We have a project that we completed for a brewery located on an apartments property. We attempted to collect payment for the project that we had completed about 3 months ago but were told that they (brewery) was waiting for a payment from the apartment complex before they would pay us. We filed a lien on the apartment to ensure we would get paid, but the Brewery says that the apartment won't give the brewery their disbursement now because we filed a lien. So they asked us to release the lien so the apartment will pay them and then they will pay us. As far as we are concerned our payment was not contingent on them receiving this money from the apartment so they should pay our invoice as they agreed to 30 day terms. What do you think would be the best course of action?