There is no discretion granted to executors or administrators; they must be vigilant in interposing against all claims presented for allowance against the funds of the estate committed to their care every legal defense that is known to them. A failure so to do makes an administrator liable on his bond.

(a) If the administrator is negligent or fails to enter proper objections any person interested in the estate may appear and defend, and prosecute, in the same manner as if he were administrator.

5 Robinson vs. Herrington, 61 Ill. App., 543.