[Serusers] Missed Call Return

Hello, I read a previous post by Iqbal (missed caller call back) where a subscriber can ring a pre-defined number which calls back their last missed call... Is my logic correct as follows?: In the missed call section (i.e. when theres a 408/487 message) do: avp_db_store("$ruri", "i:1000"); Then when the caller dials the callback number e.g.1471 this code is invoked: if (uri=~"^sip:1471@x.x.x.x"){ log(1, "in missed call return section"); avp_db_load("$from/username", "i:1000"); avp_pushto("i:1000", "$ruri"); // route as normal }; I am getting an error when restarting SER: ERROR: avops: fixup_pushto_avp: bad param 1; expected : $[ruri|hdr_name|..] Is it correct to push the AVP i:1000 to the ruri? Do I need to define aliases in the modparam perhaps? Any help would be appreciated. Many thanks, Aisling. p.s. In case anyone was following my other post regarding asterisk voicemail - It's now working using avpops, the problem was with my asterisk config. There is still a problem playing back the messages though. -------------------Legal Disclaimer--------------------------------------- The above electronic mail transmission is confidential and intended only for the person to whom it is addressed. Its contents may be protected by legal and/or professional privilege. Should it be received by you in error please contact the sender at the above quoted email address. Any unauthorised form of reproduction of this message is strictly prohibited. The Institute does not guarantee the security of any information electronically transmitted and is not liable if the information contained in this communication is not a proper and complete record of the message as transmitted by the sender nor for any delay in its receipt.