Tunnel-Password fails proxy: "tunnel password is too long for the attribute"

when a backend radius server sends bakc the following tunnel attributes, the freeradius 1.0.2 fails the request with "tunnel password is too long for the attribute"( discovered by radiusd -X). Tunnel-Server-Endpoint = 1:82.111.96.178 Tunnel-Type = 1:L2TP Tunnel-Medium-Type = 1:IP Tunnel-Password = 1:lab Framed-Protocol = PPP if I comment out the Tunnel-Passord, the proxied reply returns fine. I guess this is a problem with the tagged stting for the password, partt of which is encrypted perhaps? the backend is Radiator 3.8. directly querying the backed, without freeradius proxying, works fine. tariq