I'm a sub contractor who did small amount of work for a GC. The GC refused to pay me because they were not being paid by the Homeowner. The GC told me to file a lein on the property as they had done. We filed a lein but the notices came back "undeliverable" so we assumed we wold have to take the loss and therefore did not pursue it. Now we are being named as a defendant along with the homeowner in a lawsuit wherein the GC is seeking payment for the work that had been done? How are we liable for payment to the GC when we have never been paid for the work that we did at the requestof the GC?